Philadelphia rockers 3 Shades of Blue perform Sail in the AGT semifinals.\r<br>\r<br>\r<br>\r<br>Rock band 3 Shades of Blue shakes the AGT stage with a powerful rendition of Chains in efforts to win a coveted semifinal spot.\r<br>\r<br>Four guys from Philly put their pop-rock spin on Sail by AWOLNATION. See 3 Shades of Blue show how they made it to the Semi-Finals with their strong .\r<br>\r<br>Freelusion brings a mind-blowing performance to the AGT stage.
