Khloé Kardashian knows a thing or two about getting over a breakup – and her best advice is to get revenge with a hot bod. And that doesn't just apply to women.

The 31-year-old actually told her brother Rob Kardashian that exact same thing when he was going through a hard time.

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“I told Rob a while back: the best form of revenge is a good body,” she wrote on her app. “It’s a little silly but true. There is literally no downfall to working out your blues in the gym! You’ll feel better, and the by-product will be a fierce bod that’s bound to make your ex do a double-take.”

rob kardashian

Rob’s transformation over just a few years.

Perhaps this is what the Keeping Up With the Kardashians star told her little brother after his messy split from Rita Ora – though, we're not so sure he's been following her advice. Just last month, the 28-year-old was reportedly rushed to the hospital and diagnosed with diabetes, with several of his vital organs failing.

Click through the gallery to see Khloé's amazing weight loss over the years.