Song ID help, please

I head a song in a Honda Accord LX Commercial that I cannot find anything about (it is not the Pata Pata song, by the way).
It is sung by a Kate Nash/Lily Allen type of singer, and its kind of playful and cute, (OK, and girlish), and the lyrics go:
“I’m one, I’m two, I’m three times into you, inside my heart it still beats, bum bum, Daddy-addy-addy-addy-addy-addy uh oh…”
Any ideas?