Successful six-man a capella Jewish vocal band Six13 has released Uptown Passover, a funky pre-Passover version of the huge hit "Uptown Funk" by Mark Ronson and Bruno Mars, which commands listeners: “Don't be slaving, just nosh!”

The New York City-based group, which sounds like a full band while using nothing but the band members' voices, is also releasing its sixth album.

Six13 have over 20,000 CDs in circulation, and are among the top Jewish music artists on iTunes.

They have received distinctions and accolades from Jewish organizations like the National Council of Young Israel and Moment Magazine, and awards from musical organizations like the Harmony Sweepstakes and the Contemporary A Cappella Society of America.

The band has been featured on the Chabad Telethon, Fox, ABC, in the Huffington Post, Jewish Week and NY Daily News, and were chosen three years running from hundreds of groups, both Jewish and secular, as finalists in the casting process for NBC’s hit prime-time television series The Sing-Off. The group has also become an internet sensation, with over 1.5 million views on YouTube.