Lauren Conrad and William Tell took their romance south of the border on July 10!

The fashion designer, 26, and the University of Southern California law student, 32, jetted off to Cabo San Lucas, Mexico, for five days of fun in the sun. "It was just the two of them," a source tells the new issue of Us Weekly (out now).

Dating since February, the pair stayed in a $1,500-a-night suite (with a private hot tub!) at the Esperanza resort. "And they spent a lot of time in their room!" a source reveals.

Fore more on Conrad and Tells romantic trip, watch this week's Hot Stuff video, as explained by Us Weekly Senior Editor Ian Drew and special guest, Oscar Blandi colorist Kyle White.

Also in the roundup: Jillian Michaels is angling to rejoin The Biggest Loser, Janet Jackson is "furious" that her niece, Paris, is becoming an actress, and much more!