His petname for you
Luke- Baby...Because you were his baby. It was his job to keep you safe and loved. You were so much smaller than him too, he just loved it.
Calum- Sweety...He loved to call you 'sweeter than candy!' and 'cupcake'. Anything to do with how sweet, cute, and adorable he thought you were.
Michael- Babe...It was just what he always called you. Never changed when you got together...Didn't bother either of you. He just really loved being able to say it and know you were his.
Ashton- Whatever is on his mind... Sometimes 'Love' sometimes 'Angel' He just couldn't settle on one word to describe you. at one point, you were even his 'pumpkin' after seeing your excitement over carving a pumpkin for Halloween.