In their interview with "Backfile", Pharrell Williams talked about how Timbaland pushed him to do more then one record for Madonna:

"Timbaland was pushing me, he was like 'I like that one song you did' and I was like yeah? And he was like'u gotta hear the album I did almost the whole thing' and I was like Yeah?! Then Madonna kept teasing like 'Tim Got More Sooongs Then You, Tim Got More Songs Then You' and I was like... Okay u aint gonna like me when I start turning green..."

Source: MadonnaTribe