No one. The Mexicools theme is done by unknown artists and Eddie's is a remix of Jim Johnsin's (WWE music producer) own song. Jinfamous sings Mexicools, but NO ONE sings Eddie's. It is a mix with nobody famous doing it.
Motorhead sings Triple H's entrance song
Alter Bridge sings Edge's entrance music. The song is called "Metalingus."
Shawn Michaels sings his own entrance theme.
he sings his theme song
Jim Johnston Sings Priceless
he sings it
Jim Johnston sings Maryse's theme song?
Gregory helms sings his own entrance music
Entrance song by The Black Angels
Finger Eleven sings Kane's entrance music, though I have not been able to find the track on any of their albums, you can definitely download the song.
The entrance song for CM Punk is called, This Fire Burns, and is sung by Killswitch Engage.
Close your eyes - Story of the Year
I'm All About Cool
Shaman's Harvest sings Drew McIntyre's entrance music.The song is called Broken Dreams.