Lily Allen wowed fans when she made a surprise appearance on stage with Pink.
The pregnant singer collaborated with Pink on her new song True Love and so jetted to LA to sing it with her at the intimate gig at Sony Studios.
Lily recently confirmed that she is working on material that will be released under her married name, Lily Rose Cooper.
The 27-year-old said of the performance: "It was great, felt strange being back on stage again but Pink made me feel at ease. Really enjoyed myself though."
"Can't wait to get back out there."
Pink, who is mum to 14-month-old Willow, applauded Lily for getting on stage despite her baby bump.
She joked: "When I was five months pregnant I was at home covered in cheesecake."
During the concert, Pink, who recently became the new face of Covergirl cosmetics, showcased several tracks from her upcoming album The Truth About Love.
Photo: © Rex