✦ Kelis ✦ Natalia Kills ✦ Dawn Richard ✦ The Saturdays ✦ Nelly Furtado ✦ Cassie ✦ Kelly Rowland ✦ Crystal Waters ✦ Dannii Minogue ✦ Sophie Ellis-Bextor ✦ Kerli ✦ Trish ✦ Petra Marklund ✦Liberty X ✦ Lady Gaga
The verses in Call My Name by Cheryl Cole. Chris Martins solo part in the beginning of Princess Of China. The bridge in Part Of Me by Katy Perry. Pretty much everything BUT the bridge in 3 by Britney Spears.