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♪ ♪ ♪ we know it all and dont know nothing, at 20 something ♪ yeah, yeah, yeah ♪ >> nyc, how we feeling out there? ♪ ♪ we dont even know were learning ♪ ♪ falling in and out of loving. ♪ ♪ everybody says were legal but we know we cant be trusted ♪ ♪ know it all, dont know nothing at 20 something ♪ >> lawrence: that was alana springsteen right there performing for all american concert series. >> coming out of the gates hot >> lawrence: shes singing 20 somethi...