et ▁with ▁com ed ian ▁John ▁Oliver ▁to ▁m ourn ▁the ▁loss ▁of ▁the ▁Russian ▁space ▁ge ck os . ▁ ▁The ▁song ▁was ▁performed ▁live ▁on ▁the ▁premi ere ▁episode ▁of ▁Late ▁Night ▁with ▁S eth ▁Mey ers ▁on ▁February ▁ 2 4 , ▁ 2 0 1 4 . ▁ ▁Cover ▁versions ▁American ▁pop ▁du o ▁Alex ▁& ▁Sierra ▁performed ▁the ▁song ▁twice ▁on ▁third ▁season ▁of ▁The ▁X ▁F actor ▁( U . S .), ▁where ▁they ▁were ▁contest ants ▁and ▁eventually ▁won ▁the ▁show . ▁During ▁the ▁sixth ▁week , ▁the ▁du o ▁performed ▁the ▁song ▁for ▁the ▁first ▁time , ▁with ▁Sierra ▁on ▁the ▁piano ▁and ▁Alex ▁on ▁guitar . ▁The ▁performance ▁was ▁pra ised ▁by ▁the ▁jud ges , ▁with ▁Kelly ▁Row land , ▁one ▁of ▁them , ▁feeling ▁like ▁she ▁was ▁watching ▁an ▁awards ▁show ▁performance . ▁C atr iona ▁W ight man ▁of ▁Digital ▁Sp y ▁called ▁it ▁" pre tty ▁simple , ▁but ▁showed ▁how ▁genu in ely ▁tal ented ▁they ▁are ." ▁The ▁cover ▁version ▁of ▁the ▁song ▁sur pass ed ▁A ▁Great ▁Big ▁World ▁and ▁Agu il era ' s ▁version ▁on ▁i T unes , ▁clim bing ▁to ▁number ▁ 1 ▁the ▁morning ▁after ▁they ▁sang ▁it ▁on stage . ▁Series ▁cre ator ▁and ▁head ▁judge ▁Simon ▁Cow ell , ▁who ▁ment ored ▁the ▁group , ▁claimed ▁that ▁the ▁du o ▁success ▁is ▁proof ▁that ▁the ▁show ▁is ▁still ▁capable ▁of ▁turning ▁small - town ▁k ids ▁into ▁bank able ▁stars