Where Thankful, their first album, was a very personal experience for Erica and Tina, Incredible addresses issues that are more widely-relatable. It's all inspirational, fairly light stuff, though, tackling simple faith-related subjects like hope in the hard times, devotion to God, the struggle for self-confidence, and awe at God's unending love. The sisters always give each song their overwhelmingly positive, uplifting outlook on life. It's that distinct, deliberately happy approach to life that is quite possibly their secret weapon.

Fans of "Shackles" may not find an immediate successor to that song's infectious melody, but they'll be hard-pressed to find anything to dislike in the heavy hip-hop grooves on Incredible. But ultimately, Incredible proves once again why you just can't beat sibling harmony. Especially when the ridiculously-talented Campbell siblings are involved.