SNL's Cheri Oteri revealed that Lorne Michaels encouraged her to try an impression of Barbara Walters when she wasn't sure she could do it.

Amid behind-the-scenes turmoil at Saturday Night Live, Lorne Michaels has called the iconic sketch show 'unfunny,' signaling that upheaval and cast shake-ups are far from over.

The changes in the weeks leading up to season 51 are part of a well-established pattern in the show's long history.

With Heidi Gardner's departure ahead of SNL Season 51, we highlight and rank her best sketches, including "Taco Math" with Jessica Chastain.