There's nothing quite like celebrating the beginning of spring with a little thong-bikini action.

Wearing an over-sized sun hat, holding a mini guitar, and baring her cheeks in an orange thong bikini, Ashley Tisdale (of High School Musical) fame tweeted this vintage-looking beach photo with the caption: "What a beautiful day."

Yes, we imagine the sun and surf were quite beautiful that day, but we're too busy being hypnotized by Ashley's full moon (complete with tan lines). Looks like those hardcore gym workouts are paying off, girlfriend!

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Credit: TC / Splash News Photo: Ashley Tisdale Goes Sexy '60s