The pregnant singer went to Los Angeles to perform a duet of 'True Love' with the 'So What' hitmaker at a secret show at Sony Studios, and after the performance the brunette beauty admitted she ''can't wait'' to return to music.
The 27-year-old star - who retired in 2009 - said: ''It was great, felt strange being back on stag again but Pink made me feel at ease. Really enjoyed myself though. Can't wait to get back out there.''
Lily - who has an eight-month-old daughter with husband Sam Cooper - also compared baby tips with Pink, who has 14-month-old daughter Willow with husband Carey Hart, and the pair discussed the possibility of Lily appearing on Pink's forthcoming new album 'The Truth About Love'.
A source told the Daily Mirror newspaper: ''It was the first time they'd met, though they've spoken on the phone and emailed before. They're huge fans of each other's music, so Lily was thrilled when Pink asked her to get involved with her new album.
''Lily is five months pregnant and Pink told her she couldn't believe how amazing Lily looked, and that she could still manage to wear heels while that far gone.''