M&P9 - JG
I'm thinking the pink backstrap is available separately, but I can't find it on S&W's website at the moment.
(If it is available, it will fit your M&P40 as that's the same frame as the M&P9 pictured.)
Note the ribbon on the slide. I've seen one where that was colored in with pink. I think that was on Julie's personal gun, but it wouldn't be difficult to do.
(The JG in the model name means this is Julie Goloski-Golob's signature pistol.)
EDIT: Woops. This is the full-size M&P. Not sure if I've seen the pink for the compact M&P or not.