Taylor Swift "hates" Justin Bieber. According to Us Weekly, a source revealed that the "22" singer is sick of her best friend Selena Gomez's on-and-off again relationship with Bieber and it's now causing a rift between the two.

"Taylor hates him. She thinks Selena makes a mistake every time she reconciles with him," the source told the magazine. "Bieber has really come between the girls."

Swift hasn't exactly hid her feelings for the "Boyfriend" singer. During a press conference at the Billboard Music Awards in May a reporter asked her a question about Bieber and she refused to answer.

"Can we get another question?" she said skipping over the question.

She was also caught on camera sticking her tongue out like she was gagging when she spotted Bieber and Gomez share a kiss backstage.

It appears that Swift's dislike for Bieber is mutual. A source close to Bieber said that "he complains Taylor's always telling Selena she can do better."

A rep for the "Come and Get It" singer told the magazine however that her friendship with Swift is dong fine and they talk just about every day.

During an interview with Ryan Seacrest on E! News, Gomez told him that she was single and she was no longer dating Bieber. Not long after the interview, the "Beauty and a Beat" artist showed up to her 21st birthday party with a single red rose.

According to Hollywood Life, he left his guy friends at the door and was on a hunt to find his ex. The two reportedly "were all over each other" the entire night and Gomez looked happy that he came.

"They were definitely touchy-feely and shared some kisses and back rubbing," a source told Hollywood Life.