Blac Chyna is still smiling as she steps out after ex fiancé Tyga deems girlfriend Kylie Jenner, 17, 'more mature than most adults'

By Ryan Smith and Marc Jackson for MailOnline

Published: 02:54 EST, 8 May 2015 | Updated: 03:08 EST, 8 May 2015

She will soon celebrate her 27th birthday, but it was likely difficult for Blac Chyna to avoid her ex Tyga's assertions that his 17-year-old girlfriend, Kylie Jenner, is 'more mature than most adults'.

However, the model - whose birthday is on Monday - appeared not to be flustered by her former fiancé's opinions as she stepped out to run errands in Calabasas, California, on Thursday.

Emerging from her pink SUV, the star smiled broadly as she showed off her ample curves in a pair of red skinny jeans, which she teamed with a black leather cropped jacket and stark white boots.

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Out and about: Blac Chyna was spotted running errands in Calabasas, California, on Thursday

Toting a red quilted Chanel handbag, Blac Chyna - real name Angela Renée White - flashed a set of razor sharp manicured fingernails as she picked up packages at a local UPS store.

Rapper Tyga, 25, whose controversial romance with Kylie was confirmed in March, is said to be defiant about romancing the teen reality TV star.

Despite the notable eight-year age difference and the fact that Kylie is still in her teens, the hip-hop star has been telling pals that she is 'more mature than most adults', according to TMZ. 

Amber Rose twerks up a storm on the floor with Blac Chyna

Hey there! The shapely model was all smiles as she got into her pink SUV after picking up some packages

Taking a mature approach: The star appeared to be unaffected by her ex Tyga recently deeming teen girlfriend Kylie Jenner 'more mature than most adults'

The website claims that Tyga - real name Michael Nguyen-Stevenson - says that Kris Jenner's daughter doesn't act like a regular teenage girl due to the fact she's 'a millionaire who runs a company and even owns her own home'.

Kylie has certainly followed in the footsteps of her money-spinning family, lending her name to hair and beauty products, clothing lines and even releasing a novel with sister Kendall.

She is set to prove her independence even further in August when she moves into a $2.7 million Calabasas home - her first property.

Blac Chyna drops 10k on a stripper at Los Angeles club

She's well red: Blac Chyna, real name Angela Renée White, showed off her ample curves in red skinny jeans

Special occasion: The star, who is a decade Kylie's senior, is due to celebrate her 27th birthday on Monday 

Her grown-up attitude hasn't stopped some famous critics taking a swipe at her relationship with Tyga.

Model Amber Rose - ex-girlfriend of sister Kim's husband Kanye - got into a war of words with Khloe about the pair dating.

Amber wrote on Twitter: 'She's a baby, she needs to go to bed at 7 o'clock and relax. [Tyga] should be ashamed of himself. He has a beautiful woman and a baby and left that for a 16-year-old who just turned 17.'

Amber Rose & Blac Chyna out at Supper Club in Hollywood

Contrasts: She added to her ensemble with a black leather cropped jacket and a pair of white boots

Yummy mummy: The curvaceous star shares a son, King Cairo, with her former fiancé Tyga

The video vixen was referencing Tyga's former fiancée Blac Chyna, who is the mother of his son King Cairo.

Her love life isn't the only controversial thing Kylie is dealing with at the moment; she has finally confirmed she has had lip injections.

Kylie has never admitted to the cosmetic procedure before, despite being questioned about her changing appearance for years. 

Defiant: Tyga has reportedly been defending his romance with Kylie Jenner, pointing out that she is a wealthy businesswoman with her own home, according to TMZ

Hitting back: The couple romance has raised eyebrows since it was confirmed in March due to the eight year age gap

Living big: Kylie has snapped up her first property, a $2.7 million mansion in Calabasas that she will move into on her 18th birthday in August

Rumour mill: The pair first sparked reports they were an item earlier this year, before confirming the news on Instagram in March

'I have had temporary lip fillers,' she says in an E! clip from Keeping Up With The Kardashians. It's just something that I wanted to do.' 

Kylie said she 'wasn't ready' to talk directly to the press about the procedure and instead decided not to 'confirm or deny' it when asked by reporters.

In another clip, her sister Khloe Kardashian advises that she 'cop to it' adding: 'If you avoid the question, you're going to look like a liar.' 

Finally coming clean: Kylie has also had another controversy on her hands - she finally admitted to getting lip fillers in a clip for Keeping Up With The Kardashians

'It's an insecurity of mine': Kylie Jenner admits to lip fillers

Before and after: The teen pictured on left with fillers and on right, in 2013, before the procedure

Tell us: A reporter ask the question on everyone's lips - how did she get that famous pout?

Avoiding the topic: Kylie looked visibly uncomfortable as she then diverted to a discussion about make-up

The short video depicts the two sisters at a media event, where Kylie rushes to Khloe's side after being interviewed by members of the press, saying: 'My heart literally dropped. They were like...' 

'They asked you?' Khloe, 30, responds.

'Yeah,' the teenager says, 'They were like, "So all this lip talk. You know like tell... how do you feel about it?" I was like "ahhhhh".'

It then cuts to Khloe telling the camera in a confessional segment: 'Kylie decided to plump her lips and I don't think there is anything wrong with that. 

'I think if you've done something though, it is right to cop up to it. If you avoid the question you're gonna look like a liar.'

In another clip, her sister Khloe Kardashian advises that she 'cop to it' adding: 'If you avoid the question, you're going to look like a liar'

Confession: 'I have had temporary lip fillers,' she says in an E! clip form Keeping Up With The Kardashians

Previously, the Keeping Up With The Kardashians star staunchly maintained that her lips were all natural, and that the fullness she often flaunts on social media is down to clever make-up application. 

'I feel like everyone has been talking about it for months, so I'm kind of sick of it,' she recently told E! in an interview when asked about her pout.

'My pictures, I pout them out a lot. I think big lips are awesome,' she added. 'I love lip liner and over-lining my lips.'

Khloe Kardashian urges sister Kylie to not lie about her lips

Sisterly advice: Khloe comforts Kylie after she has a run in with a reporter wanting comment on her changing appearance

Staying quiet: Kylie grew uncomfortable with the line of questioning

'But I don't even care anymore. I'm like whatever, just say whatever you want.' 

And even her make-up artist Rob Scheppy denied reports that the 17-year-old's lips are fake in an exclusive interview with FEMAIL in December, saying: 'I find it funny that so much attention is drawn to my work, but I like it,' adding, 'Kylie's lips are created using expertly applied lip liner and a little lip balm.'

While in April last year, Kylie tweeted her own denial. 'These plastic surgery rumors hurt my feelings to be honest and are kinda insulting,' adding, 'Just in case anyone forgot... I'm 16'.

Denials: The star previously shot down talk of having plumped her lips, despite regularly showcasing her new look online

'It's an insecurity of mine': Kylie said in the KUWTK clip that she was weary of talking about her changing appearance (pictured above n Hollywood in November 2013)

Her mother Kris Jenner, who notoriously underwent plastic surgery on an episode of Keeping Up With The Kardashians, has been open to her children undergoing the knife as well. 

Khloe revealed in an interview in the February 2014 issue of Cosmopolitan UK that Kris wanted her to get a nose job at the tender age of nine.

'She didn’t mean harm, but when I was around nine I overheard my mom telling her friend I needed a nose job,' revealed the reality star.

Sweet sisters: Kylie divulged the truth after being encouraged by her sister Khloe

Plastic surgery fan: Kris, pictured at the Met Gala on Monday night in NYC, has previously admitted to going under the knife

Transitioning: Kylie's father Bruce Jenner recently revealed he is transgender, telling Diane Sawyer that 'to all intents and purposes, I'm a woman'

'I was shocked; I hadn’t even thought about it,' she said. 

Kylie's new pouty look, however, inspired a worrying trend dubbed the '#kyliejennerchallenge', which swept social media, encouraging teens to blow their lips up to epic proportions using bottles or shot glasses.

The reportedly painful method involves participants placing their mouth over the opening of a cup, jar or other narrow vessel and sucking in until the air vacuum causes their lips to swell up - all in the hopes of emulating Jenner's bee-stung pout.

Countless teens, both boys and girls, have been sharing the disturbing results of their experiments on Twitter and Instagram, which in many cases has led to severe bruising around the mouth.

Nearly two years ago: Kylie pictured with sister Kendall at the American Music Awards in Los Angeles in November 2013

Wild one: The teen enjoys posting an endless stream of selfies on social media

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