Single mom Kourtney Kardashian has her hands full with her three kids -- while her ex Scott Disick is busy handling his new 20-year-old girlfriend.

Kourt stepped out on St. Paddy's day wearing a black tank and red pants, carrying daughter Penelope and her 1-year-old Reign to her car. The mom of three took her only daughter to voice lessons on Thursday and had her youngest in tow.

The 36-year-old may not have been feeling the luck of the irish with her non-green ensemble, but her daughter was! The toddler was dressed in a green dress for the festive holiday. The on-the-go mom seems to be holding her head up high despite her ex moving on with a 20-year-old.

Yesterday, we caught up with the Lord Disick in Calabasas and asked him all about his new 20-year-old girlfriend Christine Burke, and the reality star couldn't help but brag! "She's cute, right," he quipped under his breath as he made his way to the car. It's a little weird that she looks exactly like Kendall Jenner, but we do agree with him.

This really is the weirdest family!