Sister act! Rumer Willis performs in plunging black dress with sibling Scout...as Amber Rose shows her support from sidelines

She has a passion for singing.   

And Rumer Willis showed the world her impressive vocals as she and her sister Scout, 25, serenaded the night away at The Sorting Room in Los Angeles on Sunday, as part of her Over The Love Tour. 

The 28-year-old had the crowd in the palm of her hands - and not just for her vocals - as she rocked the house in a plunging black maxi dress.  

Sister act! Rumer Willis showed the world her impressive vocals as she and her sister Scout serenaded the night away at The Sorting Room in Los Angeles on Sunday, as part of her Over The Love Tour

Special guest: Amber Rose, who is dating Rumer's former DWTS partner Val Chmerkovskiy, posed up with sisters Tallulah and Scout Willis

Audience members likely found themselves unable to take their eyes off of Rumer, as she spellbound on stage in her vampy gown. 

The singer wore her chopped brunette locks down for the occasion, as well as ample amounts of mascara.

Just gorgeous: The singer wore her chopped brunette locks down for the occasion, as well as ample amounts of mascara

Crowd pleaser! The 28-year-old had the crowd in the palm of her hands - and not just for her vocals - as she rocked the house in a plunging black maxi dress

She also wore a long layered necklace that dripped close to her cleavage and several bracelets.

Her sister strummed the guitar as she wore a hippie chic yellow dress with puffy sleeves. 

Rumer had a special guest in the audience - her former Dancing With The Stars professional partner, Val Chmerkovskiy.

Proud to present! Scout motioned towards her excited sister

Tuned up: Her sister strummed the guitar as she wore a hippie chic yellow dress with puffy sleeves

He brought his new girlfriend, Amber Rose, to the show as well, and the talk show hostess got a chance to get to know Rumer's sisters, Scout and Tallulah. 

Val shared a video of Rumer chatting about the single life to the audience, which he captioned, 'proud of you Willis. impressed. proud. grateful to be your friend and fan for life.'

Rumer has been on the road all over the U.S. as part of her Over The Love tour as of late.   

Sing a song: Willis serenaded into the microphone 

Let's give her a hand! Tye Blue pumped the audience up as Willis smiled 

Girl time: Rose cosied up to the Willis sisters in her sheer red top and leather skirt 

And the actress is poised to get a whole lot busier. 

It has just been announced that she will have a recurring role in the third season of Empire. 

It emerged on Wednesday morning that Rumer will be portraying a 'brilliant but volatile' singer named Tory Ash who works with Jamal (Jussie Smollett) in a recurring role on Empire.

Rumer will feature in the third season which is currently airing, and also includes guest appearances from the likes of Mariah Carey and French Montana. 

The rising star played Roxie Hart in Chicago on Broadway last year after winning the 20th season of Dancing With The Stars. 

Family matters: Willis pointed towards her sister, who smiled from ear-to-ear

Having a moment: The girls appeared share a sentimental moment on stage 

Aww: The talk show host shared a snap of herself that night cosying up to her new beau, Val Chmerkovskiy

 

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