Demi Lovato rocks red lips as she suits up in black leather for Redlight Traffic Dignity Gala

PUBLISHED: 01:05 EST, 19 October 2013 | UPDATED: 01:55 EST, 19 October 2013

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She dyed her blonde hair teal last week before appearing on The Tonight Show with Jay Leno.

And Demi Lovato pulled her newly blue-hued locks into a sleek ponytail for the Redlight Traffic Dignity Gala in Beverly Hills Friday night.

The 21-year-old pop singer looked sophisticated supporting the end of child trafficking in a black suit with leather leggings and sleeves.

Blue period: Demi Lovato pulled her newly blue-hued locks into a sleek ponytail for the Redlight Traffic Dignity Gala in Beverly Hills Friday night

The Heart Attack singer's flawless complexion was accented with red lipstick, and she rocked a large statement necklace and peep-toe pumps.

'I do this often. You've heard I'm bipolar. So I change my hair a lot,' Demi told Ellen Degeneres earlier this month.

'I've had black, brunette, red, like orangey red, pink, and blue so far.'

Leather mama: The 21-year-old pop singer looked sophisticated supporting the end of child trafficking in a black suit with leather leggings and sleeves

Porcelain doll: The Heart Attack singer's flawless complexion was accented with red lipstick, and she rocked a large statement necklace

Despite her young age, the former Disney starlet has already battled bipolar disorder, bulimia, and cutting.

Lovato's fourth studio album Demi just went platinum in Brazil after debuting at number three on the US Billboard 200.

And Demi's judging duties on the third season of The X Factor keep her busy as well.

Congrats! Lovato's fourth studio album Demi just went platinum in Brazil after debuting at number three on the US Billboard 200

Kicks off February 9! Her Neon Lights Tour officially begins in Vancouver with openers Brit girl-group Little Mix and X Factor finalists Fifth Harmony

Continuing October 29! Demi is also judging the third season of The X Factor

The Skyscaper hitmaker can also be seen as Santana's love interest Dani on the current season of Fox's Glee.

Lovato will next perform October 28 at the Belasco Theater in Los Angeles.

Her Neon Lights Tour officially kicks off next February 9 in Vancouver with openers Brit girl-group Little Mix and X Factor finalists Fifth Harmony.

The X Factor continues October 29 on Fox, and the fifth season of Glee will continue November 7 on Fox.

Attendees: Also at the Beverly Hilton was Boardwalk Empire's Christiane Seidel in a green gown and Graceland's Serinda Swan in a silver jumpsuit

So cute! Girl Meets World starlet Rowan Blanchard, 12, glammed up in a silver-collared top and matching mini

Lovely ladies: Athgo Ambassador Masiela Lusha wore a fur shaul, Days of Our Lives actress Jen Lilley took the plunge in a LBD, and singer Keyara went with attention-getting red

Lovely ladies: Athgo Ambassador Masiela Lusha wore a fur shaul, Days of Our Lives actress Jen Lilley took the plunge in a LBD, and singer Keyara went with attention-getting red

Also at the Beverly Hilton was Boardwalk Empire's Christiane Seidel in a green gown and Graceland's Serinda Swan in a silver jumpsuit.

Girl Meets World starlet Rowan Blanchard, 12, glammed up in a silver-collared top and matching mini.

Athgo Ambassador Masiela Lusha wore a fur shaul, Days of Our Lives actress Jen Lilley took the plunge in a LBD, and singer Keyara went with attention-getting red.