Jordin Sparks shows off her amazing bod... and a new, huge tattoo!

Jordin Sparks has come a long way from her days on "American Idol."

Since winning the show at the age of 17 back in 2007, Sparks has gone from a size 14 to a size 8 ... and added some serious ink to her slim body.

The 22-year-old singer showed off her killer figure while celebrating her one-year anniversary with boyfriend Jason Derulo at Atlantis in the Bahamas over the weekend.

Sporting a colorful two-piece bandeau bikini, Sparks also put her giant floral tattoo on display while in the pool.

Jordin also has the word "Respira" on her ribcage, Bible verses on her wrists, a dove on her hip, her brother P.J.'s initials behind her ear and a star on her finger.