Robert Pattinson and Kristen Stewart appeared “lost in each other” at the exclusive Prince concert this week.

The pair are rumoured to have fully reignited their romantic relationship following Kristen’s revelation that she cheated on Robert with director Rupert Sanders.

Prince threw a surprise show that was restricted to 200 exclusive guests in Hollywood on Tuesday night. The Sayers Club concert saw Christina Aguilera, Dita Von Teese,, Adam Levine, Nicki Minaj and other celebrity guests in the audience.

Robert and Kristen were enjoying more than the performance.

"Rob and Kristen were inseparable," a witness told Us Weekly magazine.

"They were so lost in each other, it was ridiculous. They looked just like they do in the movies... completely in love.

"They were talking very closely all night, laughing, kissing, holding hands, arms around each other. Everyone just let them be."

Speculation has been rife recently that the pair’s relationship has been tense since their reconciliation.

According to the onlooker, Robert and Kristen didn’t appear to be experiencing any problems.

"They looked very natural together. Watching them, you would never know the scandal that erupted," the source said.

"I didn't see them argue once."