Jordin Sparks ‘tweeted’ a bikini photo on Sunday in a moment of shameless self-promotion… and who can blame her?  She has been hitting the gym in order to get in shape for her upcoming tour and has already dropped 30 pounds.

Sparks said: “Something just clicked with me, and instead of sitting around talking about it I said, ‘I’m going to go hike that mountain.’  I’ve been hiking and I’ve done a couple of runs.  I also do Zumba.  It’s so much fun!”

The 21-year-old American Idol season six winner used her cell phone to capture a mirror image of herself rocking a two-piece swimsuit.  She  joked: “I don’t know why but my bathing suit reminds me of fruity pebbles.”

Sparks will join NKOTBSB on their summer tour.

Check out a before and after photos below:

Photos:  WENN, Twitter – Jordin Sparks

Filed under: Celebrities, Jordin Sparks