Taylor Swift's Celeb Friends Wish Her A Happy Birthday!

Red singer soaks up birthday wishes before premiering her 'I Knew You Were Trouble.' video Thursday on MTV at 4:40 p.m. ET.

Taylor Swift rolls with the best — meaning she has lots of friends in high places to wish her a 23rd birthday. So before the singer celebrates her b-day on Thursday (December 13) by debuting her "I Knew You Were Trouble." video on MTV at 4:40 p.m. ET, here's what fellow musicians had to say to Taylor.

"She's only 23?" Fun. asked MTV News, struck by Swift's youthful glow. Alex Clare had the same thoughts, joking that she looks a lot younger.

When others heard it was TSwift's big day, they decided to give her some love too... and some playful prods.

"Maybe people will be nice to you in the future and you can write happy records about them," Clare said with a smirk.

Getting Taylor a 23rd BDay gift? Buzzworthy's got purr-fect, Cat-themed ideas for Swifties!

Imagine Dragons and Of Monsters and Men joined in on the fun and perhaps got a bit too creepy, ("I took a celebrity bus tour and they told me where you lived...") while Jason Mraz shared some heartfelt remarks for Taylor.

"We honor you, cherish you, relish you, admire you, each and every day are inspired by you. Happy birthday," Mraz said eloquently.

"She's probably the hardest working people in show business," Fun.'s Jack Antonoff said. Bandmate Andrew Dost chimed in, "She works so hard. She deserves it." Neon Trees gave simple well-wishes, while one-time collaborator B.o.B showed his pride and excitement for the Red singer's achievements.

"Taylor Swift, happy birthday," said B.o.B, who once teamed up with Swift for "Both of Us." "Congratulations on all your success. I ordered a Papa John's pizza, and I saw her on my box and I was like, this is great. This makes my pizza that much better."

In the end, Passion Pit hoped for the country star's well-being in her 23rd year.

"Let's wish her some luck in her love life," they said. The guys from Passion Pit may be referring to Taylor's history with boyfriends. She admittedly says she falls for bad boys, which is the premise of her new video. She teased the clip on "The Big & Best of 2012" on Wednesday.

Check out exclusive behind-the-scenes photos here!

"We knew we wanted it to be some sort of corruption — good girl is living her life, going about her, you know, daily life and all of sudden she runs into this force. This guy is just like a force," Swift told MTV News. "She'll do anything to fit into his world, including change everything about herself."

After the video premieres at 4:40 p.m. ET on MTV, it will go into rotation and will be available on demand at TaylorSwift.MTV.tv.

Don't miss the premiere of "I Knew You Were Trouble." during "MTV First: Taylor Swift," airing on MTV December 13 at 4:40 p.m. ET.

Share your birthday wishes for Taylor Swift in the comments below!