Conrad and the Gossip Girl star, 26, kicked off their night of flirting at L.A.'s Voyeur nightclub and later connected at a party at actor Shawn Pyfrom's house. (Their reps deny the hookup.)
"There's always been an attraction between them," an insider tells Us of the longtime pals. "[But] Lauren is just enjoying herself. She's not taking anything too seriously!"
Take this rumour with a grain of salt - there have been on off rumours about Lauren & Chace for a while now.
Click here for more posts on Lauren Conrad
credit - Us Weekly
~Kelli at Hills Freak
Click here for more posts on Lauren Conrad
credit - Us Weekly
~Kelli at Hills Freak