CSI Guest Stars Through the Years: Justin Bieber, Holly Madison, Wolfgang Puck and More (PHOTOS)

CSI Star Cameos

A slew of special guest stars have appeared through the years on CSI: Crime Scene Investigation, including Kevin Federline (as in Britney's ex) on a Season 7 episode titled (what else?) "Fannysmackin'." And even Ray Donovan's Liev Schreiber guested as Gil Grissom's (William Petersen) temporary replacement on Season 7.

Other one-offs have included Faye Dunaway (Bonnie and Clyde), Roger Daltrey of The Who (whose song "Who Are You?" opens CSI) and Danny Bonaduce (The Partridge Family).

As the innovative show closes its Las Vegas lab doors after 15 seasons with a two-hour TV movie special on Sunday, September 27, take a trip down memory lane. Here are some other notable guest appearances (Bieber! Ozzy! Wolfgang!), most of whom appeared on later seasons and some of whom ended up in the interrogation room.

Justin Bieber

Season 11 - Episodes: "Targets of Obsessions" and "Shock Waves"

Baby-faced Biebs played Jason McCann, a serial killer who was also a bomber.

Rascal Flatts

Season 10 - Episode: "Unshockable"

As themselves, the band was playing a concert when one of them was almost electocuted.

Method Man

Season 6 - Episode: "Poppin' Tags" | Season 7 - Episode: "Big Shots" | Season 8 - Episode: "Drops' Out" | Season 11 - Episode: "Pool Shark"

The rapper had a recurring role in four episodes on different seasons as Drops, a nightclub promoter.

Holly Madison

Season 11 - Episode: "Pool Shark"

In the same Season 11 ep with Method Man, the Girls Next Door celeb had a blink-and-you'll-miss-it role as "Hot Blonde" in a bikini.

Wolfgang Puck

Season 14 - Episode: "A Last Supper"

Starring as himself, the famous chef was a guest judge on a Top Chef-esque cooking competition show, Elite Chef.

Ann-Margret

Season 11 - Episode: "Sqweegel"

The legendary Bye-Bye Birdie star played a Vegas philanthropist who died at the hands of a killer, called Sqweegel, who wore a patent-leather suit.

Carrot Top

Season 11 - Episode: "Man Up"

After a dead prostitute is found, the stand-up comedian (playing himself) was questioned by the CSI team.

Dita Von Teese

Season 11 - Episode: "A Kiss Before Frying"

Not straying too far from her real-life occupation, Von Teese starred as a sexy club performer named Rita Von Squeeze (real name: Ellen Whitebridge), but one who also moonlighted as a serial killer.

David Cassidy

Season 13 - Episode: "Last Woman Standing"

Leaving his Patridge Family days behind, Cassidy guested as Peter Coe, a skilled poker player.

Black Sabbath (Ozzy Osbourne, Ton Iommi, Geezer Butler)

Season 13 - Episode: "Skin in the Game"

On the 2013 finale, the band performed a song ("End of the Beginning") from their just-released album, 13,

Sharon Osbourne

Season 15 - Episode: "Dead Rails"

Following in her husband's footsteps, Sharon stopped by as Elise Massey, a shady pool hall manager.

John Ratzenberger

Season 14, Episode: "Torch Song"

For one ep, former Cheers co-stars Ratzenberger and Ted Danson reunited. Ratzenberger played Stu Kirchoff, the owner of a night club that burned down, opposite Danson's CSI boss, D.B. Russell.

Jordin Sparks

Season 14, Episode: "Check In and Check Out"

As Alison Stone, the American Idol winner played a teacher found during a fatal stabbing at a motel.

Gene Simmons

Season 14, Episode: "Long Road Home"

Starring as himself, the KISS frontman provided evidence to solve a case involving a mysterious band.

Lea Thompson

Season 14, Episode: "Under a Cloud"

Another mini-reunion came about when Thompson, starring as defense criminalist Jennifer Rhodes, worked alongside her former Back to the Future castmate, Elizabeth Shue.

Mark-Paul Gosselaar

Season 15, Episodes: "The CSI Effect," "The Twin Paradox," "The Greater Good," and "The End Game"

It was double the trouble when Mark-Paul Gosselaar had a four-ep arc, playing twins Jared Briscoe (a Death Row inmate known as the Gig Harbor Killer) and Paul Winthrop (a respected real-estate businessman).