He sings a small part on a song at the beginning, and it's a really nice song, then Freddie starts to sing the rest of the song.
Even though Freddie Mercury was the lead vocalist, all the members of Queen except John Deacon have sung some songs, I think the song you are referring to is Who wants to live forever, other than that some of his songs are
39 All Dead, All Dead Good Company Leaving Home Ain't Easy Let Me Live Long Away Lost Opportunity Mother Love No-One But You Sail Away Sweet Sister She Makes Me Sleeping On The Sidewalk Someday One Day
OMG THANKS! :)