Kylie Jenner lunched at The Ivy with BFF Hailey Baldwin on Thursday, and later in the day we caught Hailey shopping with Kendall Jenner at Saint Laurent. Between the Jenner sisters and Justin Bieber, Hailey really gets around town!

The model showed off her gorgeous physique in a tight suede skirt, and she posed for a few selfies with Kylie and some other pals.

Last month Hailey celebrated her birthday, and she posted an Instagram pic of some baked goods from Kendall. Baldwin posted a photo of a set of four cupcakes that said "F*ck him." She later deleted the snapshot, but not before we figured out what was going on! "She was very upset about something that happen this past week," a source tells E! News. We're willing to bet that something had to do with the Biebs...