Ariana Grande served as host and Cher performed as the musical guest during the Dec. 20 episode of 'Saturday Night Live.' Here, see the best, worst and most oops moments in our roundup of the highs, lows and yikes from the latest episode of 'SNL.

The cold open of the last "SNL" episode of the year ridiculed the Trump administration over its handling of the Epstein files release.

During its final episode of the year, "Saturday Night Live" paused to pay tribute to late producer Rob Reiner ... flashing a title card with an old photo of Rob before the show's "goodnight" segment.

Yang starred in the night's final sketch, playing a retiring airport lounge worker working his final shift on Christmas Eve, serving eggnog to travelers. He sang “Please Come Home for Christmas” and was joined by Grande, the night's host, and Cher, its musical guest. The women joined Yang in song and hugged him.

Bowen Yang is exiting Studio 8H. After a wildly successful tenure on the show, Yang, 35, will exit the cast of "Saturday Night Live" in the midst of Season 51, the breakout star confirmed.