Katy Perry Makes Unusual New Album Announcement
"Find the #PRISM semi, take a picture and I'll RT you," tweeted Perry to get the viral campaign started. "Don't worry, Los Angeles is just the first stop on the map."
Perry's fourth album, "Prism" is the follow-up to the 2010 smash, "Teenage Dream", which sold more than 5 million copies worldwide.
See a photo of the truck and read more here.
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