Now, that's discipline.

Khloe Kardashian hit the gym on Saturday in Hollywood without her new workout partner and rumored fling Matt Kemp. Her hard work has definitely paid off as the youngest Kardashian sister lost a whopping 30 pounds last year.

The reality star has intensified her workout regimen since separating from her husband Lamar Odom. The couple filed for divorce in mid December and listed their $5.5 million Tarzana mansion this week.

Khloe's mom Kris Jenner opened up about her divorce on the TODAY show on Thursday.

"It's always tough when one of your kids goes through something like this," she said. "My heart is always with them 150 percent, and Khloe -- it's tough what she's been going through, but we are just doing the best we can."

Ironically, there's wild gossip flying around town that Kris allegedly forced Khloe to work out at the age of four. Well, that would explain why she's a gym rat.