Back in 1992 Motorhead went ahead and put out probably their most commercial sounding release ever called "March Or Die", including a ballad with Ozzy and Slash.

Lemmy is best known for his gritty, down and dirty style of reckless Metal.  Back when this album was written, Metal was scrambling to stave off the grunge and alternative scene from taking over.  But instead of going heavier and darker, many bands, including Motorhead did the unthinkable and went lighter.  Needless to say it didn't work out so well.

Listening back to "March Or Die" one realizes it's not so terrible and this song he did as a duet with Ozzy with Slash on guitars is actually a nice song... just not for Motorhead.