Didn't you wonder where Kylie was going on that private jet? Mexico, b*itches!

The newly-turned 18-year-old hopped a plane to Mexico with her 25-year-old boyfriend Tyga for a romantic birthday vacation. We imagine the couple's staying at the Punta Mita home of family friend Joe Francis. Not a bad set-up for someone just barely legal!

Still, the couple will enjoy their South-of-the-Border vacay for only so long ... Kylie's due in Montreal for a paid club appearance this Sunday, in honor of her birthday. Getting paid a reported $100K to celebrate your birthday in a country where you're of legal drinking age?! It's most kids' dream!

And yet that's just the top of the iceberg for Kylie. She already had private performances by Fetty Wap and Post Malone at her nightclub birthday party; received a $15K Hermes bag from her mom and got a $260K Ferrari from Tyga. What the hell else could you want?!