Jul 19, 2016 at 7:50 am

Nick Lachey Calls Wife 'His World' on Their Fifth Anniversary

Nick Lachey and the other members of 98 Degrees perform at the Perfect Vodka Amphitheatre on Saturday (July 16) in West Palm Beach, Fla.

The band kicked off their nostalgic My2k Tour with O-Town, Dream, and Ryan Cabrera the week before in Park City, Kan., and will wrap up on August 28 in Saratoga, Calif.

The day before the West Palm Beach concert, Nick and his wife Vanessa celebrated five years of being happily married.

“Happy Anniversary to the most amazing wife, mother, and woman I know,” Nick tweeted. “I am so thankful for you and US. You’re my world. @VanessaLachey.”

Vanessa shared a romantic photo of the two on her Instagram with the caption, “10 years of Lovin’… 5 years of Marriage… 2 Beautiful Babies… 1 Crazy Love… Happy Anniversary, Baby! �’�”

Check out the sweet pic below!