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.

“Cher, killing it at 79,” another quipped. “Idc [I don’t care] about her lip syncing, it’s late, she’s 80, she just wants to have some fun,” one watcher wrote in the YouTube c omments.

A meme showed alleged quotes from the pair, including one with the famous singer telling the White House press secretary, "Sweetheart, take a seat."

Cher, 79, and her boyfriend, 39, showed up in style at the Saturday Night Live afterparty. The pop star and her partner, Alexander “AE” Edwards, arrived at the party in New York City on Saturday night wearing glitzy outfits,

Music icon Cher, 79, wowed viewers with her ageless look and hilarious cameo alongside Ariana Grande and Bowen Yang on Saturday Night Live. See details.

Cher's new holiday single “Christmas Is Here” debuts at No. 2 on a Billboard chart, blocked from becoming another No. 1 for the star by a rising viral cut.

“Saturday Night Live” fans “Believe” Cher was lip-syncing on the show this weekend. The 79-year-old pop icon was the musical guest on the sketch comedy program’s final episode of the year on Saturday, taking the stage to sing “DJ Play a Christmas Song” and “Run Run Rudolph.”

Making things official with her four-decades-younger boytoy would be the Moonstruck star's ultimate dream birthday gift when she turns the big 8-0 on May 20, RadarOnline.com can reveal. Alexander 'AE' Edwards faces marriage pressure as Cher wants a wedding ring before her 80th birthday.

As an eggnog maker in the Delta lounge, Yang reflected on his time on the series. The airport employee on his final shift said he was “gonna miss everything about this place” while Ariana Grande cut in as Yang’s wife, Rhonda. Yang summed up his own tenure in terms of the divisive holiday drink he was peddling.