Justin Bieber Back To Performing After Illness

Pop heartthrob tweets about getting the go-ahead to perform in New York Tuesday night.

Justin Bieber may have canceled his show Sunday night after being struck down by an illness, but he's bounced back and is ready to headline a show in New York. The VMA-nominated teen star tweeted that he has been cleared by his doctors to perform on Tuesday night (August 31) at Madison Square Garden, where he will film part of his upcoming 3-D movie.

"Ok the doctor said we aren't 100 percent but we are ready to ROcK!! Been cleared. MSG let's do this!!!" he tweeted on Monday. "Let's fill the streets of NYC! Rehearsals tonight were incredible...got off to a rocky start because wasnt feeling right but then after lunch kicked in. 2morrow at MSG!! Thanks to everyone who came to help today...this movie is coming together."

Fans in attendance on Tuesday will get the chance to be a part of his 3-D movie, which made Bieber seem genuinely excited. "2morrow let's fill the streets of NYC with Purple and even if you dont have tix we will b celebratin n maybe u might just find ur way inside," he wrote. "Tomorrow is a celebration....we are living a dream and playing MADISON SQUARE GARDEN in NYC!! WHO IS COMING!!?!?!? SEE U THERE!!!!!"

Rumors have been circulating for weeks that other celebrities will make cameos at the show, and among the big names in the rumor mill is "Never Say Never" guest Jaden Smith. "Special security arrangements are being made for Jaden, who will appear onstage, and his family, including [his father] Will, to be in the audience for the concert," a source told the New York Post.

Earlier this month, the film's director, Jon Chu, spoke to MTV News about the flick. "[It's] a movie for his fans, a movie for people who don't know him, and we're gonna tell the underdog story of where he came from," he explained.

"Because it's a really fascinating story and it has a lot to do with our sort of digital lifestyle now. He was able to do what corporations try to do now when they use YouTube and they don't even know what to do with it yet. It's a pretty cool story for our time."