Paltrow and Michele duet on `` Nowadays \ / Hot Honey Rag '' from the musical Chicago , and the glee club with Morrison and Paltrow perform a mash-up of `` Singin ' in the Rain '' with `` Umbrella '' by Rihanna featuring Jay-Z .
Morrison and Paltrow performed a mash-up of `` Singin ' in the Rain '' with `` Umbrella '' by Rihanna featuring Jay-Z .