Lady Gaga Sports Pregnant Belly On 'Saturday Night Live'

Star performs with fake baby bump on Justin Timberlake-hosted season finale.

As "Saturday Night Live" wrapped up its 36th season, the show let the evening's megastar guests, [artist id="3061469"]Lady Gaga[/artist] and [artist id="1231683"]Justin Timberlake[/artist], take the reins; a move that meant a revisit of some of JT's classic "SNL" gags and a live television moment only Mother Monster could deliver.

JT started the show insisting that he wouldn't be singing during his latest

appearance, only to segue into a ditty during which he busted out his

signature falsetto, serenaded a blushing audience member and brought it on

home with some soulful trills.

But JT didn't stay on the anti-singing kick for long, popping up in the

first sketch as an overeager street marketer in a beer-bottle costume armed

with booze-friendly versions of pop hits. Going up against side-eyes from a

prudish, tea-shilling Kristen Wiig, Timberlake countered with pro-imbibing

jams like a revamp of DJ Khaled's "All I Do Is Win." Lady Gaga got in on the

action, too, tottering on set in a snug vine-swathed frock with goblet-shaped

glove thingys to join Timberlake for reboot of B.o.B and Hayley Williams'

smash "Airplanes," crooning, "I could really use a drink right now." The

pair then belted "too much merlot" to Flo Rida's "Low" before switching up

the easy-listening staple "Endless Love" to "Endless Buzz," with lines like,

"No one can deny/ This hooch I have inside."

Gaga also showed off her comedic skills in a digital short alongside

Timberlake and Andy Samberg. After getting some sugar from mature vixens

Patricia Clarkson and Susan Sarandon, JT and Samberg hit the streets in

Color Me Badd fresh jumpsuits and leather bombers only to both show up at

Gaga's door clutching Alize and Bartles & Jaymes. Looking

chic in gold hoops and a gaudy getup, the pop supernova welcomed them in for an ode to the ménage a trois. "You're my best friend through thick and thin and now it's time to make a triple connection," the crew belted. "It's OK when it's in a three-way. It's not gay when it's in a three-way!"

Gaga's first onstage performance began with a much more subdued tone. Banging

away on a striped grand piano with a silvery crescent-shaped headdress, the

songstress showed off her fiery vocals with an impassioned rendition of

"Edge of Glory." Then Mother

Monster ditched the intimate vibe -- and the headpiece -- for a

club-ready performance of her speaker-rattling single "Judas." Dancers in

dark kilts and strappy, belted bodices backed up Gaga, who coordinated her

two-toned locks, shiny black body suit and thigh-high boots with the striped

stage. After flexing some of the video's high-energy choreography, Gaga

retreated to a ladder on the side of the set for a bit before launching back

into the punchy moves.

JT and Gaga kept cranking out the laughs as the songstress owned Timberlake

in a celebrity edition of "What's That Name?" While Timberlake handily

identified animated '90s Paula Abdul collaborator MC Skat Kat, the

singer/actor blanked on the name of a bubbly hook-up from two weeks ago, and

even struck out on Taran Killiam as Timberlake's fellow 'NSYNC member Chris

Kirkpatrick. Grinning in a latex blazer and bra, Gaga easily remembered a

fan she met in passing, schooled JT on the purpose of his charity and

rattled off names of the stage crew and audience.

Timberlake put his growing acting skills to work in every sketch, creeping

out Jason Sudeikis as a handsy member of a robotic barbershop trio on a

hokey carnival ride, sparring with Bill Hader's decrepit local news

correspondent and continuously flubbing the retro "Secret Word" game as a

campy magician peddling crusty tricks.

For her last onstage trick, Gaga revisited the futuristic birth theme of her February Grammy performance of "Born This Way," revving up the performance with some S&M touches. Once again, the superstar emerged from an egg-shaped structure, this time however the vessel was adorned with caviar-like lumps. Gaga hit the stage in a cropped latex top with voluminous shoulders and second-skin leggings as fog encircled the singer and her crew. Swapping out the flesh-tone tunics from the Grammy performance for shiny belly-baring tops and slashed culottes, the dancers rocked the choreography as Gaga whipped her blonde ponytail around. Enveloped by her dancers for an onstage costume change, Mother Monster ramped up the drama by getting outfitted with a prosthetic latex-covered pregnancy belly. Gaga vamped it up in the fake baby bump as her crew hoisted her onto a throne and caressed her body, and glitter rained onto the pop diva.

The show closed with a cameo appearance from "SNL" alum and late-night host

Jimmy Fallon for the "Barry Gibb Talk Show." Timberlake reprised his role as

apathetic sidekick Robin Gibb to Fallon's jumpy, karate-chopping Barry as he

grilled guests about the U.S. debt. JT stayed largely mum as Fallon

continued to wig out, only piping up to briefly harmonize, "We suckled at

the same teat!" Yet Timberlake was quick to revive Fallon when he froze

during a signature freak-out. When the comedian came to, Fallon exclaimed,

"I survived the Rapture!"

What did you think of "SNL" this week? Let us know in the comments!

Don't miss MTV News' hour-long exclusive interview, "Lady Gaga: Inside the Outside," airing Thursday, May 26, at 9 p.m. and 11 p.m. ET/PT on MTV.