Singer Adam Lambert does not believe he's competing with the late Freddie Mercury by joining the British rock band Queen for one performance.

The 30-year-old Lambert will join Queen at the Sonisphere Festival in Knebworth, England on July 7.

The iconic rock band currently includes guitarist Brian May and drummer Roger Taylor. Taylor and May formed the band Smile, which frontman Mercury altered to Queen when he joined. Mercury died in 1991 of complications due to AIDS.

Lambert performed several songs with Queen at last year's MTV European Music Awards (EMA) in Belfast.

During an interview with NME, Lambert insisted he's not trying to replace Mercury.

“The way I look at it is I'm not trying to imitate or outdo him or compete in any way, that's not even in my mind at all,” Lambert said. “I think it's really an honor to be asked to sing the music that he and the band wrote and get up there and put on a good show. If people are too busy trying to compare, they're not going to enjoy the music.”