Singer Alexandra Burke. London - Arabstoday   Alexandra Burke has only just turned 23 even though it feels as though she's been on the music scene for a long time. Burke looked beautiful and vibrant in a white Grecian maxidress. The floor-skimming number looked great, oozing class and sex appeal - matched with a lush new hairstyle complete with blonde highlights. At the beginning of her party, which she held at Gilgamesh restaurant/club, she wore a fitted mini dress, in charcoal grey matched with a pair of cream heels; the dress showed off her toned legs and stomach. Guests at the party included TV and radio host Denise Van Outen, TOWIE star Lauren Pope, Amy Winehouse's niece Dionne Bromfield, One Direction and rapper Chipmunk. Denise helped celebrate the singer's birthday by getting her up on stage to sing Happy Birthday to her in front of the whole club. Alex then took the mic and performed a few of her hits, before she disappeared for a quick change.