Glee's star Darren Criss adlibs for Rolling Stone. He answers questions singing and explains he grew up in the gay community in San Francisco. He also tells he's thrilled to perform a gay character who falls in love, and that he is currently a "guest star" but the producers have the option to make...

Our mini Warbler loves to wear his suit day and night. Added bonus...he also likes to perform all the songs that the Warblers from Glee sing and dance to.

GLEE's Darren Cris performs "Not Al;one" in support of the Trevor Project.

Sometimes you promise someone forever but it doesn't work out that way. Watch Katy Perry and Diego Luna star in the sixth chapter of the "Teenage Dream" story.

Music video by Katy Perry feat. Kanye West performing E.T. Director: Floria Sigismondi Producers: Natasha Alexsa Garcia, Danny Lockwood, Kelly Norris Sarno

Katy Perry's "Firework" is the first non-Christmas song I synchronized to lights. The song is a favorite with the entire family and my wife and kids sing along whenever it is on. In October 2011 Light-O-Rama came out with their new S3 software and I was really excited to sequence a song, and I'd bee...

Darren Criss transforms "Da Ya Think I'm Sexy" in his tribute to ASCAP Founders Award honoree Rod Stewart at the 2011 ASCAP Pop Music Awards in Los Angeles. ASCAP's hundreds of thousands of songwriter, composer and music publisher members all have one thing in common: they are driven to create. ASCA...

Things were never the same again after shirtless YouTuber WatchBenSing had an onstage encounter with Katy Perry.

LYRICS FOR TEENAGE BILLIONAIRE:             Sing Along

I wanna be a billionaire
So freakin bad
Buy all of the things
I never had
I wanna be on the cover of
Forbes magazine
Smiling next to oprah
and the queen
Oh everytime I close my eyes
I see my name in shining lights
A different cit

Katy Perry performed hit song 'Firework' in the inauguration concert of US President Joe Biden and Vice President Kamala Harris. (Video: Biden Inauguration Committee)