The `Holly`s World` star has parted ways with All Time Low guitarist Jack Barakat after around seven months of dating, with the break-up said to be mutual.
A spokesperson for the blonde beauty told E! Online: "I can confirm Holly and Jack are no longer dating. Their decision to split was both mutual and amicable."
News of the split comes just a month after 31-year-old Holly - who previously dated Playboy mogul Hugh Hefner - said she was happier in her relationship with the musician than she had ever been with anyone else.
She said: "He`s a really down to earth guy. I feel like he`s really real and he knows me for who I am. I can say whatever in front of him and he`s cool with it.
"I love that Jack has a sense of humour and I can just be myself around him. I don`t need to be like Miss Priss or Betty Crocker. I feel like every guy that I dated before him expected that."
Holly previously revealed she and Jack first sparked up a romance on micro-blogging website twitter.
She explained: "We met through a mutual friend and then somehow somebody retweeted something funny he said on Twitter.
"So I started following him, and then we started tweeting each other back and forth! Then we started direct messaging each other and then exchanged numbers."