Mischa Barton was seen leaving London's Cirque Du Soir Nightclub. The venue had hosted Capital FM's Summertime Ball after-party. Other stars in attendance included Jessie J, Pixie Lott and Katy Perry.
Perrie Edwards from Little Mix spent the evening with her band mates and X Factor mentor Tulisa Contostavlos at Movida nightclub. The band left in a black taxi and were up bright and early today for an appearance at the Nando's GigNics event in Haggerston Park.
Meanwhile, Adam Lambert took to the G-A-Y stage to perform songs from his latest album Tresspassing. Earlier in the day Adam had tweeted his excitement about the forthcoming gig.
Check out all of this weekend's celebrity pictures in our gallery below: