P. Diddy's Dirty Money boot camp

P. Diddy turned his Dirty Money bandmates into "monsters".

The 'Hello Good Morning' hitmaker formed the rap group with singers Dawn Richard and Kalenna Harper, who told how he put them through a tough "boot camp" to become part of the group.

Kalenna told website SOHH.com: "In this industry you continue to grow until you're really old and being with Puff, it's like we were shot up with steroids.

"He put us in his boot camp and it was so crazy. We knew things before but I just think at this point he's created two monsters.

"Producing the record, writing the lyrics, how to go deeper in your mind and your soul, making them more vulnerable and exposed to people were all learned."

She also claimed this training has allowed her to establish a strong connection with Dawn, which gives them almost a sixth sense to communicate on stage.

Kalenna added: "As a group, Dawn could be on the side of the stage and she can wink her right eye and I can wink my left and it's so epic. We're just so in-tune and of course with Puff, he loves the energy. He loves the Yin and the Yang. We're real strong and vice versa."

Dirty Money's debut album, 'Last Train To Paris' is released on January 24.