"Dancing With the Stars" Peta Murgatroyd -- Look Ma, NO CELLULITE!!

Getting booted of "Dancing With the Stars" in week one is working out just fine for Ron Artest's partner -- because Peta Murgatroyd just signed a SIX FIGURE deal to fight cellulite.

Sources close to Murgatroyd tell TMZ she's working with Adonia Organics to endorse their cellulite serum -- which claims to reduce the dreaded "c word" in just nine minutes. And, yes ... we're told Peta's killer legs will be on full display for the campaign.

Finally, an upside to cellulite.