It was Gleek heaven!

PHOTOS: Glee Rocks The Staples Center

The kids from Glee rocked out the Staples Center in Los Angeles Saturday night, before thousands of screaming fans, and there wasn't an empty seat in the house.

The cast kicked off their second annual Glee Live Concert Tour this weekend, performing more than a dozen songs, including Lady Gaga's rousing anthem Born This Way.

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Just as in the TV show,  for that number, the cast donned t-shirts emblazoned with bold-lettered phrases to describe them -- from Kurt's Like Boys to Finn's Can't Dance To Mike Changs Can't Sing.

Many fans in the audience got in the spirit and donned similar t-shirts with the same phrases.

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Lovely Leah Michele wowed the crowd with her best Barbra -- raising the roof with a rousing rendition of Don't Rain On My Parade -- and later teamed with Chris Colfer for their show-stopping duet of Happy Days Are Here Again.

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Heather Morris once again proved she's a talent to be reckoned with as she wowed the crowd performing Britney Spears' I'm A Slave For U.

Newer cast members Chord Overstreet and Ashley Fink joined the tour this year.

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Glee's break-out guest star Darren Criss also joined the tour, and along with the Warblers, they performed several songs, including their instant classic take on Katy Perry's Teenage Dream.

The Glee Live Concert will be crisscrossing  the U.S. for the next month, before heading overseas with stops in London and Dublin in late June.

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