Jennifer Lopez got a sweet surprise from boyfriend Casper Smart.

On her 44th birthday, Lopez got a one-of-a-kind vintage pieces from the Platt Boutique in L.A., selecting a ’70s yellow gold and diamond chain link bracelet and a ’40s gold and diamond ring, both with a coordinating buckle motif.

The owner of Platt Boutique dished about the special birthday gift, which Casper picked out himself.

 “He told me he had bought her jewelry before, but never vintage,” owner Larry Platt told PEOPLE, “so he wanted to go in a different direction, something one-of-a-kind.”

“He has a very good eye and knew what he wanted,” Platt said. “He was looking for vintage pieces that had a chic, modern feel to them. He told me that there are only two pieces of jewelry that Jennifer wears on a daily basis, so he wanted to pick pieces that he felt she would wear all the time and could go with everything.”

On Wednesday, July 24 (Lopez's birthday), the choreographer took to Twitter to wish Lopez a happy 44th birthday in a sweet tweet for his "bear."

"HAPPY BIRTHDAY to my very very beautiful bear the nicest, sweetest, funniest, sexiest bear there is!" he wrote. "Love u."

Smart, 26, and Lopez have been dating since 2011 following the singer's split with husband Marc Anthony.

Lopez told Harper's Bazaar earlier this year, she could not be more thrilled with where her life is right now.

"He's fantastic; he's like my best friend. I can tell him everything, when I'm feeling down, when I'm feeling good," she told the magazine in January. "He gives moral support, endless love and support."