lachey1pic460inset.jpghome photo courtesy of MLS

Nick Lachey, 37, is ready to move on to bigger and better things ... and in this case, we're talking about houses!

The former 98 Degrees singer, who will soon be marrying Vanessa Minnillo, has listed his $5.9 million Bel Air bachelor pad for sale. The 4,700-sq.-ft. estate boasts four bedrooms, large pool and an insane view of Los Angeles.

See photos of the gorgeous home in the gallery below. Find out who owned the Bel Air pad before Nick ... after the jump.