- 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:
Afraid of Bangs?
Rachel McAdams dishes on her 'About Time' makeunder, the hairstyle she's too afraid to rock in real life and more!Watch Video »
Kim Kardashian talks to ET about her new life with Kanye West and their new home they bought together.Watch Video »
Check out the Kardashians' best swimsuit moments during their family vacation in St. Barths on today's Celebs Gone Social.Watch Video »
Did Olivia Wilde, Kate Winslet, and Scarlett Johansson stun in the fashion department this week? Watch OMG Celeb Fashion to find out!Watch Video »
OMG Celeb Fashion
Check out Jennifer Lawrence, January Jones, and Miley Cyrus' style statements on this week's OMG Celeb Fashion.Watch Video »
Bad Summer Looks
From Miley Cyrus to Nicki Minaj, see some of the worst summer fashion in Hollywood.Watch Video »
Like us on Facebook?
UP NEXTWeek in Photos
From Crowd Ignite