"I'm in Love with a Capital "U"" is a song recorded by American country music artist Joe Diffie.

It was released in May 1995 as the fourth single from the album Third Rock from the Sun.

The song reached #21 on the Billboard Hot Country Singles & Tracks chart.

[1] The song was written by Paul Nelson and Craig Wiseman.

This 1995 country song-related article is a stub.