"Thanks again to Conan O'Brien for all the well wishes. Tomorrow night at the Wiltern is on! Gonna catch all the zzz's now. For worried folks - didn't go to the hospital today. Was just really hoarse/sinus c**p made my voice suck. Already feeling a lot better!" Paramore singer Hayley Williams is bouncing back after falling sick and cancelling a performance on Conan O Brien's U.S. talk show on Tuesday (30Apr13).