Coachella is a carefree place  for the most part.

Kristen Stewart and Robert Pattison's weekend at the music festival got a bit more stressful than they expected when they ran into Liberty Ross, according to The Sun.

As you may recall, Liberty was married to director Rupert Sanders when word got out that he and Kristen were spending some quality time together last summer. Liberty and Rupert parted ways earlier this year.

Kristen and Rob were listening to hip-hop group Jurassic 5 perform on April 12 when they suddenly noticed that they were standing very close to Liberty Ross, who was there with her current boyfriend, American Idol's Jimmy Iovine. 

Kristen apparently was relieved that Liberty didn't appear to notice that she was standing there, as Kristen "still feels incredibly guilty” about what happened between herself and Rupert.

”The last thing she wanted to do was make Liberty feel uncomfortable,” a source says about Kristen. ”[Kristen] looked pretty upset in the backstage bar later on that evening.”

Thankfully, Kristen and Rob left the area, and there was no encounter between them and Liberty.

And it sounds like that was the only tense moment of the entire weekend for the happy Twilight twosome. 

Kristen and Rob were photographed throughout the weekend, holding hands and getting romantic as they listened to music at the outdoor festival in the CA desert. 

We just hope Rob and Kristen remembered the sunscreen this weekend. We don't want them to start sparkling or anything.

Source: The Sun via Hollywood Life