NBC had previously announced that Emmy winners Tina Fey and Justin Timberlake will be hosting the first and last of three new May Sweeps episodes of "Saturday Night Live." Now we know who will be taking the stage for the month's other episode.
 
Ed Helms will be dropping by the May 14 episode, hosting for the first time, while promoting both the conclusion of the "Office" season and "The Hangover II." He'll be paired with one of the show's most venerable musical guests, Paul Simon, who will be making his eighth appearance as musical guest.
 
Former "SNL" star and head-writer Tina Fey will be taking the hosting reins for the third time on May 7, with Ellie Goulding making her first appearance as musical guest.
 
Then, two weeks later, "SNL" will have a big-name finale with Justin Timberlake's fourth hosting stint and a second musical appearance by Lady Gaga.