Happy Throwback Thursday!
Heidi Montag was a little ahead of the curve, posting two adorable pictures of herself and her younger brother, Sky, for his 21st birthday on Monday.
"Happy Birthday little Sky Sky!" she captioned one of them. She also posted a pic of one of his Hawaiian-themed birthday parties (which they apparently had while it was snowing).
In a third photo, Heidi is rocking braces as she and her baby bro hang out by the water.
We know the reality star has admitted to having a bunch of plastic surgeries, but we're still shocked by how different she looked when she was a kid.
Side note: It looks like her eyes might have changed color somewhere along the line, too.
Check out the other two throwbacks below and tell us which one you think is the cutest.