who sang

[fillcan]

Apart from the Eagles, who else sang, "I cant tell you why"?

[Fanriffic]

I Can't Tell You Why by The Eagles.
Written by Don Henley, Glenn Frey, Timothy B. Schmit. (1979)

Covered by: Howard Hewitt (1990)
Vince Gill (1993)
Nashville Superpickers (1994)

There may be other versions kicking around.

[kempie]

http://en.wikipedia.org/wiki/I_Can't_Tell_You_ Why