While the Glee cover of Cee Lo Green 's `` Forget You '' and mash-up of `` Singin ' in the Rain '' with Rihanna 's `` Umbrella '' attracted critical praise and charted both on the Billboard Hot 100 and internationally , the episode 's dance-based performances were criticized for their choreography and strict adherence to the original versions .
The cover version of Cee Lo Green 's `` Forget You '' and mash-up of `` Singin ' in the Rain '' with Rihanna 's `` Umbrella '' was given good reviews .