World Cafe

There's not much about Ben Sollee's career that could be described as conventional. The singer-songwriter's primary instrument is the cello, and his work ranges from traditional classical music to Asian folk tunes. Even his preferred method of transportation on tour deviates from the norm; he's been known to travel from one show to the next on a bicycle with his cello strapped to the back.

Alabama Shakes, a soulful rock 'n' roll quartet, is riding a well-deserved wave to fame. Since the release of its self-titled debut in 2011, the band has entranced listeners with its diverse and energetic songs. Alabama Shakes' style is marked by lead singer Brittany Howard's powerful voice and the group's irresistible energy. Together, they enthusiastically blend rock with soul, country, blues and roots.

It took a while, but the London folk-rock band Mumford & Sons broke big with its 2009 debut album, Sigh No More. The album combines the raspy vocals of singer Marcus Mumford with lush harmonies and rootsy instrumentation on tracks that range from soothing to rocking.

A band's sound is only as big as its members, and Edward Sharpe and the Magnetic Zeros' music is huge. The 10 members are a whirl of roving horns, as well as whistles, claps, shouts, strummed string instruments and percussion involving drums, hands and anything else they can find. The group's communal folk sound blew up in 2009 with the heart-pounding, foot-stomping single "Home"; with its universal sentiment, the song includes a back-and-forth between frontman Alex Ebert and bandmate Jade Castrinos.

April was a great month for The Lumineers. In addition to releasing its eponymous debut, the band played a ton of sold-out shows across the U.S.

Gotye (a.k.a. Wouter "Wally" De Backer) has become an international pop star on the strength of his new album, Making Mirrors. The poppy collection includes "Somebody That I Used To Know," which has topped the charts in six countries and hit the Top 20 in 14 others. There's something hauntingly relatable and undeniably catchy about the insightful, ubiquitous break-up song.

Becoming a rock star has major implications — just ask John Mayer. The singer-songwriter's personal history and relationships are all public knowledge, thanks to the enormous media attention that the 34-year-old attracts. The attention in turn attracts trouble, but Mayer, who has just released his fifth solo studio album, tries to take it all in stride.

Bonnie Raitt is a blues-rock legend with nine Grammys and five platinum albums under her belt. Her rootsy and passionate take on everything blues — combined with her intimate understanding of composition, deft slide-guitar skills and soulful vocals — helped Raitt become an icon.