Jessica Simpson and Tony Romo
Evan Agostini/AP; Frazer Harrison/ACMA/Getty
12/03/2007 at 06:00 AM EST
The Dallas Cowboys had the weekend off – but quarterback Tony Romo still made plenty of passes.
and the NFL star flirted up a storm Saturday at
Hollywood nightclub Teddy's, as the two helped Simpson's BFF, Cacee Cobb, celebrate her 30th birthday.
At first, the singer – wearing a form-fitting black dress and spike heels – and her new beau kept things low-key in a secluded booth. But as the night wore on, the two were spotted with their arms around each other. Then, after a few seconds of conversation, they leaned in for a kiss – right in the middle of the crowded club.
Also on hand for the bash were Cobb's Scrubs
-star boyfriend, Donald Faison, and Simpson's mane man, Ken Paves.
Last month, Simpson and Romo, both 27, shared Thanksgiving dinner in Dallas
. The Cowboys star has previously dated Carrie Underwood
, Britney Spears
and Sophia Bush.