Lady Gaga dotes on Sir Elton John's son Zachary and often visits the singer's home to see her godson.
The Rocket Man hitmaker and his partner David Furnish became first-time parents last Christmas (10) and they asked the Poker Face star to become godmother to the tot.
Lady Gaga insists she takes her duties seriously, and has opened up about her devotion to the youngster.
She tells British TV host Jonathan Ross, "Zachary's so beautiful. I gave him a bath the other day. It's so very sweet because you're giving him a bath and he's the most beautiful boy ever.
"It's so funny because we have this sweet little boat for pouring water to rinse soap off Zachary, and as I'm pouring it, Elton is singing Tiny Dancer and I'm thinking, 'This kid has no clue that his father is such a legend'. I could not see a happier family than I see in them."
The full interview with Lady Gaga on The Jonathan Ross Show will air in the U.K. on Saturday night (08Oct11).