Selena Gomez can now jam out to Taylor Swift's song "22" with conviction because she's officially feeling 22.

It's hard to believe that the former Disney starlet, who we've literally watched grow up before our very eyes, is celebrating her 22nd birthday today. From Wizards of Waverly Place to Princess Protection Program and Ramona and Beezus, Selena has starred in tons of our favorite Disney Channel shows and movies. Plus, let's not forget about her guest appearances in The Suite Life of Zack and Cody and Hannah Montana. Those were the days. Sigh.

Since we're obviously feeling nostalgic (Selena is freaking 22!), we've decided to take a trip down memory lane. Click through to see 22 pics that will make you seriously miss Selena's Disney days, then let us know which pics you love the most in the comments below. Don't forget to leave your birthday wishes!

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