Billy Joel had a BIG surprise in store for the guests at his annual Fourth of July party on Saturday: a wedding!

The singer and his pregnant girlfriend Alexis Roderick tied the knot in front of family in friends on his Long Island property in a ceremony that not even the guests were aware of beforehand.

billy joel alexis roderick

Alexa and Billy Joel with Alexis Roderick

The couple, who have been together since 2009, celebrated their union with his 29-year-old daughter, Alexa Ray (whose mom is Billy's ex wife Christie Brinkley), as well as actor Kevin James and New York Governor Andrew Cuomo, who officiated the ceremony.

But these two aren't the only celebs to use the national celebration as their special day. Three other famous couples also tied the knot.

Next up is Vanessa Williams, who said "I do" to fiancé Jim Skrip in New York in a surprise ceremony on Saturday after two years together.

The couple, who met in 2013 in Egypt, announced their engagement in September last year.

vanessa williams jim skrip

Plain White Ts singer Tim Lopez got hitched with Jenna Reeves on Saturday night. The pair actually met on Eva Longoria's reality dating series Ready for Love.

Tara Coster, who came in third place during season 7 of The Biggest Loser, also tied the knot with fiancé John Baranowski in New York on the Fourth.

According to Us Weekly, the blushing bride showed off her weight loss that she's kept off for six years in a stunning Victor Harper dress in front of 185 guests.

"He’s the reason for so much happiness in my life," she said in a statement. "We’ve chosen to live this life together, because there’s no one else in the entire world we’d rather do it with."