JLS won best group for a second year running for their track Eyes Wide Shut, while Olly Murs won the the male category and Jessie J walked away with best female artist, newcomer and song for her single Price Tag.
Girl's Aloud star Nicola Roberts, Marina and the Diamonds and Charlie Simpson were on hand to treat guests to a live performance.
Nicola Roberts, who recently launched her solo career, worked some monochrome prints in a straight-of-the-catwalk slinky Topshop unique SS12 maxi dress with Xtra Factor presenter Caroline Flack also sporting some prints with her animal number.
Other guests in attendance included fashion stylist Grace Woodward, the Kaiser Chiefs and model Florence Brudenell-Bruce.
By Annabelle Spranklen