Listen to Megan and Liz on iHeartRadio

Megan and Liz were in New York City Saturday for the Gramercy Theater stop on their American Rag headlining tour, and afterwards they stopped by syndicated radio show Saturday Night Online where they chatted with Romeo and delivered two very special performances.

The talented twin sisters got their start performing covers and original songs on YouTube before they signed their own record deal, and they still appreciate a good cover. For the first time ever, Megan & Liz performed an acoustic cover of Katy Perry's brand new song, "Roar" live on the radio across the country. Check out the performance:

While in studio with Romeo, the 2012 Macy's iHeartRadio Rising Star winners also performed a special stripped-down version of their latest single, upbeat I'm-over-you anthem, "Release You."

Buy "Release You" on iTunes

Check it out:

Watch Megan & Liz's interview and dance party: