"It's Gotta Be You" is the debut and winner's single by Isaiah, the series eight winner of The X Factor Australia. "It's Gotta Be You" was written by Anthony Egizii and David Musumeci and was released digitally immediately after it was announced he had won, on 21 November 2016 as the lead single from his self-titled debut album. The song debuted and peaked at number 26 on the ARIA Singles Chart.

Isaiah performed "It's Gotta Be You" live for the first time during The X Factor grand final announcement show on 21 November 2016. He reprised the song after he was announced as the winner. "This has been my dream, and I can't believe it came true on my birthday," Firebrace said after the announcement. Isaiah performed the song live on The Morning Show on 22 November 2016.

"It's Gotta Be You" debuted on the Australian ARIA Charts at number 26, from three days of sales. It is the lowest debut for an Australian X Factor winner's single and first to miss the ARIA top ten.

^*sales figures based on certification alone
^{^}shipments figures based on certification alone

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