Jennifer Lopez and Maksim Chmerkovskiy Very “Affectionate” at Her 45th Birthday Dinner: All the Party Details!

Jennifer Lopez, Maksim ChmerkovskiyJason Merritt/Timothy Hiatt/Getty Images

Jennifer Lopez had one hunky guy by her side during her 45th birthday dinner last night!

The sexy singer reunited with her rumored beau Maksim Chmerkovskiy while celebrating at Greek restaurant and lounge Nammos Estiatorio in Southhampton Thursday.

J.Lo’s b-day bash started around 9 p.m. Guests included Lopez’s longtime manager Benny Medina, Khloé Kardashian and boyfriend French Montana, Scott Disick, Lopez’s BFF Leah Remini, Fat Joe, Kelly Ripa and Mark Consuelos, Brian Atwood and Andy Cohen, a source tells E! News exclusively. “Jennifer was the last to get there, she came with her sisters,” the insider dished. “She looked amazing in a white crop bustier underneath a white pantsuit. She was glowing.”

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Jennifer Lopez, InstagramInstagram

“Dinner was served on the patio. The mood was light and sexy,” the source added of the b-day bash, which was planned by Sindy Mashiah, Lopez’s longtime event planner, and Nammos’ Karim Amatullah. “Everyone was having a ball. After the meal, Benny Medina got up and made a touching speech. He was saying it’s not about the number of years you live, but the years you put into living. After that they brought out the cake—it was enormous! Jennifer blew out the candles and thanked everyone.”

After the formal dinner, everyone hit the dance floor. “No one danced more than Jennifer,” the source said. “She barely sat down all night! Of course, the DJ played some of her hits. She was really tearing it up, dancing until the very end.”

Khloe Kardashian, Jennifer Lopez, InstagramInstagram

As for Chmerkovskiy, the insider said he didn’t arrive to the birthday party until around 1 a.m. The DWTS pro and the b-day girl were very “affectionate,” according to the source. “They seemed really happy to see each other,” they said.

Too cute.

J.Lo posted a selfie from the party last night, writing, “Let the games begin! #itsmyparty #funtimes #birthdaygirl #aintnuthingbutanumber Too cute.” Khloé also shared, “She served it last night!!! Happy birthday @jlo.”

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