Julianne Hough Chord Overstreet Cory Montieth Dianna Agron

Julianne Hough Chord Overstreet Cory Montieth Dianna Agron

Chord Overstreet, his Glee co-stars, and friends commemorated Cory Monteith at a concert Chord dedicated to the recently deceased actor.

The singer dedicated an original song to Cory in his first live performance with a band at the intimate show Saturday in Los Angeles. Cory's castmates Dianna Agron, Kevin McHale, and Jenna Ushkowitz, as well as his friends Julianne Hough and Ashley Benson attended the concert.

Chord also sand Travie McCoy's "Billionaire" last night. "I sang this with Kevin McHale and Cory Monteith. I love you Cory!" he told the crowd.

Cory died of a heroin and alcohol overdose in his Vancouver hotel room on July 13. He was reportedly cremated in Vancouver. Production on Glee's fifth season has been pushed back two weeks in light of the tragedy. A memorial service for the cast and crew will be held next week on the Paramount Pictures lot in Hollywood.

"He was the greatest dude you'd ever met," Chord told E! News. "I spent more time with him than I have with anyone in my family in the last three or four years. … We're a family.