Mrs O was already treated to congratulatory messages from her colleagues, flowers and a cake over the X Factor live show weekend, but one celebration is never enough, right?!
Her actual birthday was 9 October and she turned 64.
Sharon was joined by fellow judges Nicole Scherzinger and Louis Walsh, and X Factor host Dermot O'Leary and his wife Dee for another night of fun at the exclusive Arts Club in Mayfair, London.
No doubt Sharon was also celebrating having all three of her X Factor acts through to week two – including the controversial Honey G.
Honey G and Relley C both sailed through to the Motown-themed second live show, but there was a nailbiting Sunday night for Sharon and Saara Aalto, as the Finnish singer landed in the bottom two alongside Ottavio and Bradley and had to sing for survival. In the end, all the judges bar Louis Walsh – who mentored Bratavio – chose to save Saara.
As well as celebrating with her X Factor colleagues, music matriarch Sharon also marked her big day over in the US on her American chatshow The Talk.
Husband Ozzy Osbourne made a surprise appearance, bringing Sharon flowers live on air! She looked absolutely STUNNED as he appeared in the studio, before standing up to give him a big hug and a kiss.