It's hard to believe that 10 years have passed since Mary Mary helped unleash gospel music constrictions with its debut crossover hit, "Shackles." But after forging a successful, decade-long career, sisters Erica and Tina Campbell aren't content to phone it in-a malady affecting many artists these days. No, the ladies prove they're just as vibrant, free-spirited and forward-looking as ever with their new album, "Something Big." Fans have already heated up lead single "Walking" into a top 10 adult R&B hit. But that song is just the preamble to what's in store. The opening title track declares the sisters' mission by way of a heart-pumping, foot-stomping sample from the Jackson 5 gem "Mama's Pearl." From there, it's on to the driven, don't-give-up anthem "Never Wave My Flag." The sisters-who co-wrote a majority of the tracks-show they haven't lost touch with their traditional roots on the compelling track "It Is Well." Whether fusing gospel and soul with everything from R&B/hip-hop to dance, pop, jazz and even folk (on the liberating "Homecoming Glory"), Mary Mary never forgets to weave in an empowering, uplifting message that lingers long after the last note has sounded.