"Whatcha Say" is the debut single by American recording artist Jason Derülo. It was produced by J. R. Rotem with additional production by German producer Fuego and heavily samples the song "Hide and Seek" by Imogen Heap. "Whatcha Say" topped the U.S. Hot 100 in the United States.

Jason Derülo recorded a new French-English version with Fanny J, a singer from French Guiana. A new music video has also been released.

"Whatcha Say" received mixed reviews. Glenn Gamboa of Newsdaywrote: "For fans of Imogen Heap's "Hide and Seek," the new Jason DeRulo single "Whatcha Say"—which liberally samples from the song and even uses Heap's chorus as his own chorus—may be hard to swallow. But DeRulo weaves easily in and out of Heap's parts and matches his AutoTuned vocals to hers pretty well to craft a catchy, if derivative, little number." Upon its November 2009 UK release, noted R&B writer Pete Lewis of 'Blues & Soul' described the single as "Blending pounding beats and Derulo's rich, soulful vocals with an instantly-infectious pop hook sampled from alternative/indie songstress Imogen Heap".

The song was performed live by Derulo on Thanksgiving Day in Philadelphia for the 90th anniversary of the 6abc IKEA Thanksgiving Day Parade. The song was also featured on the popular teen show, Gossip Girl, in the episode "Treasure of Serena Madre", which premiered on November 30, 2009.

The music video was released as the free video of the week on iTunes on October 27, 2009. In the music video, Derülo is seen cuddling on the couch inside a home penetrated by sunny lights with his love interest, and later on during the video, he is outside her door, waiting impatiently for her to forgive him, and begging her to let him in. Which follows the lyrics in his song, "So let me in, give me another chance..." The music video premiered on Monday, November 16 on MTV's AMTV. A music video was also released for the acoustic version, with J.R. Rotem playing the piano.

The "Whatcha Say EP" was released on October 23, 2009. It features various remixes of the song along with the original and acoustic version of the song.

"Whatcha Say" debuted on the Hot 100 at fifty four in the issue dated August 29, 2009. It reached number one in the issue dated November 14, 2009. The song also reached the number-one spot on the Canadian Nielsen SoundScan Digital Songs chart. "Whatcha Say" entered and peaked on the UK Singles Chart on November 22, 2009 at #3.

Radio hosts, JJ & Ean from Malaysia English radio station, Hitz.fm, created a parody entitled "How To Pay"