U.D.O., the German metal act led by former Accept fronman Udo Dirkschneider, revealed the track listing and covert art Sunday for their upcoming collection of rare tracks titled "Celebrator."  The album is scheduled to hit stores on May 4th through AFM Records and will contain various B-sides and bonus tracks from deluxe editions of the band's albums, as well as some never-before-heard renditions of several Accept classics including a piano version of "Balls to the Wall" and a Hammerfall rendition of "Head Over Heels."  The album also features contributions from Raven and Warlock frontwoman Doro Pesch.  Check out the cover and track list below. 

"Celebrator" track listing

CD 1:

01. Stormbreaker ("Rev-Raptor" Japan BONUS)
02. Tallyman (Taken from the "Rev-Raptor" recording session)
03. Run! (Remix)
04. Free Or Rebellion (bonus "Leatherhead" Single)
05. Bleeding Heart ("Dominator" Japan bonus)
06. The Silencer (Taken from the "Dominator" recording session)
07. Bodyworld (bonus "Infected" Single)
08. Systematic Madness (bonus "Infected" Single)
09. HAMMERFALL feat. Udo Dirkschneider - Head Over Heels
10. Balls To The Wall (piano version)
11. Artificialized (Taken from the "Mastercutor" recording session)
12. LORDI feat. Udo Dirkschneider - They Only Come Out At Night
13. Streets Of Sin (bonus "Wrong Side Of Midnight" single)

CD 2:

01. Tears Of A Clown ("Classical Version")
02. Man A King Ruler ("Mastercutor" Japan bonus)
03. Hardcore Lover (remix from "24/7" single)
04. Scream Killers (bonus "24/7" single)
05. U.D.O. feat. Faktor2 - Platchet Soldat (remix with national Russian artist)
06. Borderline ("Thunderball" Japan bonus)
07. U.D.O. feat. Doro - Dancing With An Angel (remix)
08. X-T-C (remix from "A Tribute To ACCEPT Vol. 2")
09. Azrael (remix from "No Limits")
10. The Key (remix from "No Limits" Japan bonus)
11. Metal Gods (from "A Tribute To Judas Priest")
12. RAVEN feat. Udo Dirkschneider - Born To Be Wild