Whether it's luxury labels like Rock & Republic or bargain buys like American Eagle, it's obvious that Selena Gomez, who turns 19-years-old today, has an affinity for denim.

The Disney star and girlfriend of tween heartthrob Justin Bieber can be spotted in any style -- from faded to dark wash, cutoffs to skinnies and everything in between. What's more impressive than Gomez's extensive collection of denim is her knack for styling the looks: if she's hitting the red carpet, peep-toe pumps are a must; if she's on a date with Bieber, she'll add a boho top and comfy flats.

So click through the gallery below to witness Gomez's love for jeans, and make sure to lets us know in the comments section below which denim style you can't live without.

Meanwhile, check out the 10 denim hybrids we hope Gomez will never try!