After their Australian tour, Simple Plan became good friends with a local singer (and former X Factor contestant), Christina Parie, who got their attention after they saw her cover version of Jet Lag on YouTube and invited her to tour with them as the female singer on the song in Australia.
Christina is now in LA, which is “coincidentally” where Pierre flew yesterday and Chuck today, and according to one of her tweets, she will be meeting up with the guys tomorrow for a songwriting session. Most probably though it will be Christina’s song, not Simple Plan’s.