Grammys 2017: Blue Ivy crashes the ultimate star-studded Carpool Karaoke

Grammys host James Corden has pulled off the ultimate Carpool Karaoke, with the help of a few A-list friends (and their kids). Yup, it's an Ellen Oscar selfie kinda moment!

The Late Late Show host "wore" a cut-out of a car while perching himself next to Jennifer Lopez…as one does.

What happened next was entirely unexpected. James roped in all of the singers seated nearby for a magical rendition of Neil Diamond's 'Sweet Caroline'. With Neil Diamond himself!

And John Legend! And Keith Urban! And Faith Hill and Tim McGraw! And then came Beyonce's daughter Blue Ivy, who just had to get in the shot.

At five years old, she's already a natural in the spotlight. Let's hope the twins don't change that!

Best dressed? Blue and Jay Z. Image: Getty.

And if you haven't seen her mum Queen Bey's performance yet...well, it was a near-religious experience.