8. Kourtney Kardashian
Like her sister, the reality TV star relieved her stress from splitting with her on-again, off-again boyfriend
, Scott Disick, in July by toning her tummy and getting seriously slim. The hot mama of three -- who has recently been trying to "make things work"
with Disick -- has never looked better, and it looks like she's already getting her youngest sister, Kylie Jenner
, to be her full-time workout buddy in 2016.