Christina Aguilera pays tribute to John Lennon

London: Pop star Christina Aguilera took to the stage to pay a musical tribute to John Lennon at the launch of a special edition pen in the legendary musician`s name.

The `Dirrty` hitmaker attended the global launch of The Montblanc John Lennon Edition in New York on Sunday, the proceeds of which will help give children access to music education, Contactmusic reported.

And to mark what would have been Lennon`s 70th birthday next month, Aguilera took to the microphone to belt out a heartfelt rendition of `Imagine`, the former Beatles star`s most famous song.