ET spills his secrets of minting musical gold with Missy, Madonna, Beyonce, and more.
The rappers tongue-twisting 2002 hit didnt come easy.
We cut the song at least five times before it was right, Timbaland recalls.

Credit: Paras Griffin/Getty Images
She had different lyrics, different [flows], but I just didnt care for it.
Thats something that she did creatively, says the producer.
Nelly Furtado, Promiscuous
Furtado was initially hesitant about recording this sexually charged duet.
She was like, Oh no, Tim, Im not doing that!
I told her, Im not saying exploit yourself, Im sayingshowcaseyourself.'
The track was one of the last songs to be completed for FurtadosLooseLP.
The moment of truth was playing it back with everyone in the room, Timbaland says.
The label loved it and chose it as the records first U.S. single.
We were traveling, [so] there were a lot of moving parts.
It was more of a survey for me.
Theyre one of my favorite groups.
The studio washot, Timbaland remembers.
But apart from her high-temp preferences, there was no diva behavior in the booth.
She was down-to-earth Madonna, he says.
Shes very matter-of-fact but still very fun and loving and into her craft.
(Contrary to internet rumors, Timbaland says, a full-length version of Yonce doesnt exist.)
Still, the secretive star cut her vocals away from the group.
Says Timbaland, She goes in her own room with the engineer and shuts the door.
Timbaland is also readying his first studio album in eight years, which is due later this year.