Cheryl Fernandez-Versini left boyfriend Liam Payne at home and partied at Simon Cowell's summer bash with the other men in her life - Reggie and Bollie.
The brunette beauty looked to be having a blast as she was reunited with the duo, who she mentored on The X Factor last year, at Simon's Syco Summer Party in London.
Despite the steamy temperatures, Cheryl looked cool and elegant in a blue Missoni outfit, with her long hair in waves over her shoulders.
A host of other X Factor stars were at the lavish soiree at Lancaster House, including Louis Walsh and last year's winner Louisa Johnson.
The singer is clearly becoming every inch the seasoned pop star, as she stepped out in a delicate pink lace dress and a pair of towering heels.
X Factor alumni Fleur East and Ella Henderson were in attendance, and both appeared to be having more laughs with TV's Mr Nasty Simon than they did when they were terrified contestants on the show.
Former winner James Arthur looked virtually unrecognisable in a jacket, shades and what appears to be a new hair colour.
Simon's other half Lauren Silverman looked dazzling in a fitted white dress with her hair up, and she made sure she kept cool by carrying a rather fetching parasol.