Watch Howie Mandel Embarrass Calvin Harris With a Taylor Swift Joke

Awkwarrrrd ....

Things got awkward fast at Caesars Palace's 50th anniversary gala in Las Vegas on Saturday, when comedian Howie Mandel surprised Calvin Harris with a joke about his ex, Taylor Swift.

Mandel presented Harris with the Future Icon Award on stage, when he couldn't resist a little ribbing.

"I like your suit, who's your tailor?" Mandel, 60, cracked. "See what I did?"

WATCH: Taylor Swift Steps Out Smiling After Calvin Harris' Twitter Slam

Harris laughed off the pun, but definitely looked more than a little embarrassed.

"Wow, you had that prepared. You got that one ready," he told the America's Got Talent judge.

Mandel hosted the night's festivities, which also featured a Tony Bennett performance, and a welcome from Jennifer Lopez, who's currently enjoying her own Vegas residency. Harris maintains a residency at Omnia nightclub inside Caesars Palace.

The Scottish DJ, 32, posted a pic with Bennett on Instagram, excited to spend time with the 90-year-old crooner.

"An honor to meet a living legend!!!" he wrote.

WATCH: The 4 Biggest Bombshell Accusations From Calvin Harris' Twitter Rant About Taylor Swift

Harris seems to have moved on from his June split from Swift. Last month, he helped ring in Lopez's 47th birthday, partying with none other than Swift's nemesis, Kim Kardashian West.

Watch below: