Martha Reader and The Vowelles: Rug

Martha Reader and The Vowelles: Rug is an installment in Martha Reader and The Vowelles series.

Plot
Martha Reader and the Vowelles sing their number one hit word "rug."

Lyrics
Martha Reader and The Vowelles/Lyrics

Missing Letter
r__

r u g

Adding Letters and Words
r + ug = rug

Only Appearance

 * Hug, Hug, Hug!