Listen to What Your Mamma Don't See (Your Mama Don't Know) online. What Your Mamma Don't See (Your Mama Don't Know) is an English language song and is sung by Gary Glitter. What Your Mamma Don't See (Your Mama Don't Know), from the album Gary Glitter - The Ultimate, 25 Years Of Hits, was released in the year 2005. The duration of the song is 3:17. Download English songs online from JioSaavn.