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Formed in 1998 by frontman Jared Leto and his older brother, 30 Seconds to Mars found success in the 2000s with a mix of post-grunge, screamo, and hard rock. The band gained a modest audience with its debut album, but it was the platinum-selling sophomore effort A Beautiful Lie that officially opened the flood gates in 2005, securing the band a frequent presence on MTV while paving the way for a number of successful tours. By placing all-access passes into 12 copies of the album, the bandmates also showed a savvy appreciation for marketing, which they revisited several years later by putting fans' photographs on the cover of their third album, This Is War. Initially known for his work as an actor (most notably on the '90s TV drama My So-Called Life, as well as movies like Requiem for a Dream and Fight Club), Jared Leto decided to flex his musical muscles as he approached his 30s. He enlisted the help of his brother, drummer Shannon Leto, and co-founded 30 Seconds to Mars in 1998. The...