Despite some family drama, Kris Jenner definitely has a spring in her step!

The reality star mom seemed unfazed by reports that her only son was in rehab when she attended a lunch at trendy eatery Madeo on Thursday.

For the meal, too-cool Kris donned a three-quarter-length coat, snug leather skinnies and a big smile. She's one hip and happy granny! It looks like nothing, not even the news that her son is in rehab, can get this cheery 59-year-old down!

Earlier this week, several outlets reported that troubled son Rob Kardashian had checked into a 60-day Palm Beach rehab center that deals with drug and alcohol addiction.

However, Kris told ETOnline that the rumors were "completely fabricated." Well we will give her credit, the momager definitely knows a lot about "completely fabricated."

On an episode of Keeping Up with the Kardashians, Kris wasn't so light-hearted about her troubled son's problems. Bruce Jenner's ex told her daughters, "I feel like if I don't help him do something drastic, that he's gonna die."

We hope Rob really is getting help and that if he is -- Kris Jenner will stop her luncheon long enough to notice!