Justin Bieber's new song Yummy is an ode to (sex with) his wife Hailey Baldwin

'Yummy' hit streaming services Thursday night, more than four years after the pop singer's most recent solo album, 2015's 'Purpose'.

"I'm elated that you are my lady."

That's what Justin Bieber tells us – well, tells his new wife – in his long-awaited comeback single, Yummy, which hit streaming services Thursday night, more than four years after the pop singer's most recent solo album, 2015's "Purpose."