These Stars Celebrate National Underwear Day All Year Long was originally published on globalgrind.com
1. Ciara’s underwear pic is classic.
2. Iggy Azalea gave us a peek.
3. Kendall Jenner looks perfect in her Calvins.
4. Trey Songz loves an underwear bathroom selfie just like the rest of us.
5. When is Justin Bieber not in his underwear?
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