Jason Wahler was in rehab when rumors of a sex tape with Lauren Conrad surfaced – so he’s returning to The Hills next week to set the record straight.

“The whole thing that Heidi [Montag] and Spencer [Pratt] said about the tape thing, its just so annoying,” Wahler, 20, told Ryan Seacrest Wednesday. “They just need to shut up.”

A fight was sparked after rumors spread that Conrad had made a sex tape with ex-boyfriend Wahler – rumors which she believes Montag, 20, and her fiancé, Spencer Pratt, started. Conrad, 21, denies she ever made such a tape

“The most frustrating part is that they are such lowlifes that they have to come up with stuff to try and ruin other people,” says Wahler. “It’s just frustrating.”

Speaking on Seacrest’s KISS-FM radio show to promote his guest appearance Sept. 10, the recently engaged Wahler denies the existence of a sex tape and says he regards Conrad as a close ally.

“Lauren was a good friend, she was always there to be supportive and stuff,” Wahler said. “Things definitely get stirred up [on Monday night’s episode]. You’ll have to wait and see.” Adding – when asked if he hooks up with her – “No, I don’t.”

Source: People

The Hills star Jason Wahler, who recently completed rehab, is engaged to college tennis player Katja Decker-Sadowski, his rep confirms.

Wahler, 20, proposed to the 19-year-old USC freshman Saturday in front of a group of friends – including his ex-girlfriend Lauren Conrad – during a housewarming party in their Los Angeles home.

Wahler gave her a four-carat emerald cut diamond from XIV Karat in Beverly Hills.

No wedding date has been set for the couple, who recently moved in together.

Wahler, who is filming a new MTV show Celebrity Rap Superstar, returns to The Hills on the Sept. 10 episode.

After several clashes with the law – four drinking-related arrests on charges ranging from disorderly conduct to assault – Wahler recently completed two months in rehab for alcohol abuse.

“I relate to Lindsay [Lohan],” Wahler told PEOPLE in June, “because she’s the same age as I am. I’m only 20. And to say that I can’t drink ever again – even on my 21st birthday – is hard. But I don’t care, as long as I’m healthy and happy.”

Source: People