By Bronwyn Barnes
Updated Jul 21, 2011 @ 5:45 pm
Richard Young/Startraksphoto

After walking the red carpet with co-star Jason Sudekis at the UK premiere of Horrible Bosses, Jennifer Aniston sampled the London nightlife, hitting the exclusive members only club Shoreditch House with real-life leading man Justin Theroux. Click through the gallery to see Alicia Keys, Selena Gomez and more stars at last night's hottest parties!