Russell Brand (born on June 4, 1975 in Grays, Essex, England) really did sing the 10 songs performed by his character Aldous Snow in the film Get Him to the Greek (2010). He also co-wrote another, Super Tight, with Jason Segel, and Lyle Workman.
Currently, Brand is the host of FX's late-night talk show Brand X. His latest film projects include Paradise and Despicable Me 2. No release date announced yet for Paradise, but Despicable Me 2 is scheduled to hit theaters on July 3, 2013.
Of interest, Brand recently appeared on Conan and revealed that he was unable to successfully convince Tom Cruise to ask him to join the Church of Scientology. He also disclosed his crush on Oscar winner Jennifer Lawrence.