Jenelle Evans is another year older today!

The birthday girl, who turns 25, first shot to small-screen fame when Teen Mom 2 premiered in January 2011 — and we seriously can't get over how much she's changed since then.

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We bet this will be a good year for the reality star, who is pregnant with baby No. 3. This will make her first child with her current boyfriend, David Eason.

Check out Jenelle's transformation in the gallery!