The Sunday Mirror reports that the 'Promise This' singer jumped on the unsuspecting Bieber with her hand over his mouth after she spotted him glancing over.
"Cheryl was in great spirits. She kept catching Justin staring over at her. So she surprised him and pretended to kiss him," a source claimed.
While the X Factor judge left the Brits without a gong despite her two nominations, the 16-year-old 'Baby' singer won the 'International Breakthrough Act' trophy.
