Kristen Stewart, Robert Pattinson Party at Coachella Near Liberty Ross and Jimmy Iovine

Awkward!

While Kristen Stewart and Robert Pattinson were having a PDA-filled weekend at the Coachella Music Festival, so were Liberty Ross and her new love interest Jimmy Iovine.

Ross is the soon to be ex-wife of "Snow White and the Huntsman" director Rupert Sanders, with whom Stewart was caught having an affair last summer. Stewart was dating her "Twilight Saga" co-star, Pattinson, at the time. Pattinson, 26, and Stewart, 23, were photographed at Coachella Friday night along with pal Katy Perry where the group of friends watched Jurassic 5 perform.

Ross and Iovine were also roaming around Coachella, although there are no confirmed reports that the two couples ran into each other. If Stewart and Ross did come face to face, you would have never known it from Liberty's demeanor later on in the night.

Ross attended the Diesel + Edun Studio Africa Event at Tally Horse Ranch Friday night with her boyfriend and Bono. "She was in great spirits, and looked fantastic," an onlooker tells omg!.

Here's what else we know: Ross and Iovine spent the weekend together a few miles away from Pattinson and Stewart, who rented a private house. The former co-stars are Coachella regulars, while Iovine's son, Jamie Iovine -- aka DJ Eye -- was in town to spin for a portion of the Chevrolet Volt Valley party out in Indio, California. The elder Iovine is co-founder of Interscope Records, and has appeared as a mentor on "American Idol."

Iovine and Ross -- a 34-year-old model -- have been quietly dating for about four months.

"They are going strong," a friend of the power couple tells omg!. "He was really there for Liberty during hard times. I think they are great together."

Adds another source: "It seems like things are getting serious."

Meanwhile, Pattinson and Stewart have been going strong since they reconciled after the cheating scandal last fall. It seems like we have seen more lovey-dovey photos of the couple in the last three weeks than we have their entire relationship!

The couple was photographed kissing and holding hands during a lunch date recently in the Los Feliz neighborhood of L.A. and just last week Pattinson helped Stewart celebrate her 23rd birthday.

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