Bam!

Kourtney Kardashian had a nigh out on the town Friday night, strutting her stuff in a sheer top and black lace bra (yowza!). And as hot as she looked, the newly-single mom kept her cool when valet brought her car to her with a scrape on the rear fender. Apparently, the accident happened earlier in the day, when Kourt was at an office building for a meeting. Eh, no biggie ... she'll probably just get a new car!

Anywho ... the mother-of-three's nerves must be a little rattled given baby daddy Scott Disick's recent behavior. Despite spending time with the kids recently, he turned around and hit up Brody Jenner's birthday party last week with a hot young girl by his side! Uh, not cool, Scott! Seems the Lord can't keep his libido in check ...

Meanwhile, momager Kris Jenner says her daughter Kourt is "her hero." In an interview with Haute Living New York, Kris says: "She's kind of my hero right now. She always puts her children first and is accepting, loving, and dedicated to her family -- she doesn't get easily ruffled. This situation has made me realize how strong she is."

Strong, indeed!