Kourtney Kardashian seems to be unfazed about estranged baby daddy Scott Disick dating an 18-year-old. The 'Keeping  Up With the Kardashians' star was reportedly having the time of her life with pop superstar Justin Bieber.

According to Entertainment Tonight, the pair were seen leaving "The Nice Guy" in West Hollywood. Bieber is known to be good friends with the Kardashians, having been neighbors with them in Calabasas, California. Bieber was even rumored to have dated Kourtney's younger sisters, Kendall and Kylie Jenner.

The sexy mama reportedly left with Bieber driving off on his black Escalade. The pair had drove off to Universal Studios Hollywood Horror Nights with three unnamed women. According to the source, the pair were enjoying each other's company with Bieber teasing Kourtney about being scared at the horror park.

Bieber even posted a picture of him and Kourtney while inside the "This is the End" 3D Maze. The pair were all smiles and Kourtney doesn't seem to mind the entire Scott Disick fiasco.

While Bieber has had his fair share of controversy, the 21-year-old singer has proved his loyalty to the Kardashians, even defending Kylie Jenner when she came under fire after sporting cornrows in an Instagram selfie.

E!Online reports that eyewitnesses caught Bieber with his arm around Kourtney's waist. The pair were apparently enjoying each other's company. While Kourtney is newly single now that Scott is out of the way, Bieber has been known to break a lot of hearts including on-and-off girlfriend Selena Gomez.

Bieber has hung out with Kourtney's children on numerous occasions. In the season of "Keeping Up with the Kardashians" Scott Disick has become an unwelcome member of the family following the cheating news. The entire family was infuriated after seeing a picture of Disick and the 18-year-old made its way to the newspapers.

Kris Jenner had called Disick "a piece of s***!" With that, Kourtney ended her relationship with her longtime partner and while the pair's relationship has been turbulent at best, reports are saying that the split will most likely be for good this time.

Kourtney Kardashian has been keeping herself busy lately after a nasty split with her on-and-off again boyfriend Scot Disick. This time, Kourtney seems to have had enough with Scott's cheating ways, tossing him aside to the curb. The sultry mother of three had a sexy photoshoot with Vanity Fair, in which she posed nude.