Celebrity pictures: Cheryl Cole, Emma Stone, Colin Farrell

Today's celebrity pictures include a childish Simon Cowell gesturing behind Louis Walsh's head as the X Factor pair leave the Arts Club in Central London, and a Grecian Cheryl Cole and equally-as-elegant Danielle Lineker arrive for the Prince's Trust charity dinner at the Savoy.

In LA, The Help's Emma Stone and the film's Academy Award nominees Viola Davis and Bafta winner Octavia Spencer arrive for the 5th Annual Essence Black Women In Hollywood Luncheon, while co-star Jessica Chastain attends the Hollywood Reporter's 84th Annual Academy Award nominees bash instead.