But it sounds like the long arm of the couple's desire for privacy has even got ahold of Timbaland!
"What are you talking about?" Timbaland said with a big smile when I asked him about the toast before he guest deejayed Sunday at the Hard Rock Hotel & Casino's Rehab pool party in Las Vegas. "What engagement party?...I will not answer that because I don't know what you're talking about."
He won't budge on whether he'll perform at the wedding either. "I don't know what you're talking about. I'm going to perform at Justin Bieber's wedding. He's getting married to that girl Selena Gomez."
Kidding aside, Timbaland gushed about Timberlake, "That's my bro. That's magic. That's Harry Potter, Lord of the Rings. We are all of those. He's Zeus and I'm Poseidon."
Demi Lovato is also a favorite. "She can sing," Timbaland said. "She's real good. She's super good…Demi is the best. She's a great vocalist."
Maybe she can perform at the wedding?