- Photo: MJAA/ZDS/WENN1 of 13
- Photo: FDU19/WENN2 of 13
- Photo: FDU19/WENN3 of 13
- Photo: FDU19/WENN4 of 13
- Photo: Ben Dome/Nathanael Jones/PacificCoastNews.com5 of 13
- Photo: FDU19/WENN6 of 13
- Photo: Ben Dome/Nathanael Jones/PacificCoastNews.com7 of 13
- Photo: FDU19/WENN8 of 13
- Photo: FDU19/WENN9 of 13
- Photo: FDU19/WENN10 of 13
- Photo: FDU19/WENN11 of 13
- Photo: Kevin Mazur/WireImage12 of 13
- Photo: Christopher Polk/Getty Images North America13 of 13
By Kat Giantis
The pair, whose monthlong fling kicked off in April with PDA galore at the Coachella Music Festival, started their evening at local hot spot The Dove before heading to a warehouse party, where they hung out into the wee hours.
Katy, 27, who was rocking a green dress, a black leather jacket and purple tresses, tried to keep her distance from Ackroyd in front of the paparazzi (see pic below), which is quite a change from their previous public handsiness.
The soon-to-be-ex-Mrs. Russell Brand supposedly called time on the romance in mid-May because of career commitments and trust issues.
"Rob is a good guy, but she just wants to focus on her work," a source told E! News. "She's still dealing with getting over her marriage, and it's going to take her a while to truly be able to trust anyone again."
Us Weekly echoed the amicable nature of their split.
"It's not a nasty thing, and they are still talking, but Katy told him to do his thing and they'll talk soon," a source explained, with another adding, "No hard feelings. She's really busy and so is he."
Whatever the state of her relationship with the strapping Ackroyd, she still has her friends -- and her sense of humor. During a recent radio station interview, Katy was asked whether she was planning a musical collaboration with BFF Rihanna.
"No," she said. "But we're gonna have sex."
RELATED ON WONDERWALL AND MSN:
Mandy & Minka
From girls’ nights out to working out, see how Minka Kelly is helping Mandy Moore cope post-breakup!Watch Video »
Check out Salma Hayek's most wonderfully wacky Instagram posts on today's Celebs Gone Social.Watch Video »
Alicia Keys and Swizz Beatz, plus more famous duos share photos from their date nights on today's Celebs Gone Social.Watch Video »
Takes on Tinder!
Find out all about Hilary's experience with the dating app on Replay hosted by Wonderwall's Kirby Kristen.Watch Video »
Moms' Night Out
Jessica Alba, Kerry Washington and Molly Sims enjoy an A-list moms' night out on today's Celebs Gone Social.Watch Video »
Check out Elizabeth Banks, Jada Pinkett Smith, and Mariah Carey's style statements on this week's OMG Celeb Fashion.Watch Video »