The Britain's Got Talent judge looked sensational as she arrived for the RUComingOut.com bash at the Vauxhall Tavern on Thursday (23 July).
She flaunted her fab figure in a black bra, striped mesh top and leather skirt, teamed with eye-catching fluorescent pink boots.
Alesha unveiled her newly-dyed blonde locks on Tuesday, after switching up her style courtesy of trusty glam squad – and we LOVE it!
Last night's bash was in support of RUComingOut.com, which is fundraising to help launch its first book. The organisation "inspires, supports and unites those who are living their lives either completely, or partially in the closet."
Alesha tweeted her support yesterday, saying: "Keep up the great work! Helping people around the world, being a support and comfort to those who need it...Congrats on a successful night!"
Other stars who attended the party included TOWIE's Danielle Armstrong and celeb couple Ricky Rayment and Marnie Simpson.
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