EXCLUSIVE: Read it here first...

Sundancing with the Stars: Welcome, Mr. Timberlake

Sun., Jan. 21, 2007 12:10 PM PST by Marc Malkin

Sienna Miller, Scott Speedman, Kate Walsh

Jamie McCarthy/WireImage.com, John Shearer/WireImage.com, Alexandra Wyman/WireImage.com

The eagle has landed. Yes, Justin Timberlake is here. I saw him last night at Motorola’s annual late-night Sundance soiree.

And J.T. was looking like the hottie he certainly is, with a nearly shaved head, a little scruff on his face and a simple black hoodie.

He was actually one of the first to arrive, quickly heading to a bowling game, one of the many Nintendo Wii stations scattered around the party. He spent most of the evening—well, at least the three hours or so I was there—in a corner with a slew of friends. He put his arm around Lance Bass as they chatted with Save Me star Chad Allen.

At one point, a male fan told Timberlake he had tickets to his upcoming concert in Chicago. "It will be great," Timberlake said. "I promise I won’t suck."

There's still no definitive answer on whether Timberlake will perform during his Sundance stay. The latest I hear is he’ll join his Black Snake Moan costar Samuel L. Jackson onstage at the movie's Klipsch-hosted premiere party on Wednesday night. Jackson onstage? Yup. He plays a blues musician in the flick and is said to be quite the performer.

The Motorola bash was a bevy of some of Hollywood’s most eligible single guys. Along with Timberlake, newly available Adam Brody was there, as was hotter-than-hot Scott Speedman.

As I was leaving, one of the party planners told me Sienna Miller and Sean "Diddy" Combs were expected to come together. "They’re not together together," the planner said. "But they’re like new party buddies."

Glad I didn’t stick around to see if they ever appeared (they still hadn’t by the time I took off at about 2 a.m.), because I just found out they were no-shows.