Madonna's Children Lourdes and Rocco Look So Grown Up as They Playfully Kiss Each Other on Vacation

Looks like Madonna's kids aren't waiting until midnight to have a New Year's Eve kiss.

As the Grammy winner continues to savor her winter vacation in the mountains of Gstaad, Switzerland, the "Holiday" singer managed to take a break from riding the slopes to post a fun picture of Lourdes and Rocco.

 "2 halves of my ❤," Madonna captioned the photo as Lourdes tried to kiss her younger brother on the cheek. "#rebelheart #livingforlove"

Based on Rocco's hilarious facial expression, we have a feeling someone felt a little too cool expressing their love for a sibling on social media. Oh, gotta love those teenage years. 

In the past year alone, Lourdes has reached many milestones in her life. In addition to graduating from high school, the fashionista enrolled at her mom's alma matter, University of Michigan. The 18-year-old is currently studying musical theatre and dance as she works towards her bachelor of fine arts degree.

But enough about school! What has this fabulous family been up to during their much-deserved vacation?

It looks like a whole lot of snowboarding.

The Material Girl herself bundled up with Oakley gear as she carried a pair of skis up to the mountain. Not to be outdone, Rocco also proved to be quite the athlete when he experienced a bit of a tumble during one of his runs.

"Snowboard Legend!" she wrote on Instagram with a picture of her son's bruised arm. "Unapologeticbetch!" See, maybe Lourdes was just trying to kiss her brother's boo-boo! 

Whatever the case may be, Madonna wouldn't want to end the year any differently.

"Last day of 2014!" she wrote with a stunning picture of her surroundings. "So lucky and grateful am I. #Livingforlove #RebelHeart."