Tiffany Thornton shows off her pearly whites as she signs a giant Sonny With A Chance poster at Planet Hollywood in NYC on Wednesday afternoon (November 25).

The 23-year-old actress will be performing in the Macy’s Thanksgiving Day Parade TOMORROW with Kermit The Frog. Together, they’ll be singing their new song, “I Believe.”

Tiff dished to Popstar! that she is beyond nervous, saying, “I was at FAO Schwartz earlier and someone told me, ‘You know 48 million tune into the parade every year.’ I started to cry because I had no idea! I just did a Miami parade and 20,000 people were there and I was like ‘Oh gosh, 20,000?!’ I freaked out. But 48 million people? That’s crazy. It’s overwhelming. I would watch this parade every year in Texas with my family and now we’re here! It’s just incredible!”

Be sure to tweet your questions for Tiff to Zach Sang. He’ll be interviewing her tonight!