Miley Cyrus and Liam Hemsworth 'Carpool Karaoke' with Justin Bieber hit

Miley Cyrus and Liam Hemsworth haven't been on James Corden's "Carpool Karaoke" segment yet, but they had their own private ride-along session while singing Justin Bieber's 'Love Yourself' in Liam's car.

In a clip Miley, 23, shared on Instagram, she keeps the camera only on herself and her new beagle Barbie as she rides in the passenger seat and Justin's song plays in the background. Liam's face isn't visible as she sings parts of the lyrics, but he can be heard belting out the song beside her as he drives.

"BGVs: @liamhemsworth Starring : Barbie Da Beagle @beaglefreedom," Miley captioned the video. While Liam, 26, seemed to be really into their jam session (he nailed his every note), he abruptly stopped singing to play a joke on Miley and yelled as he seemingly pretended to hit something on the road.

"Babe, stop! Seriously!", Miley yelled back. In spite of Liam's interruption, this is still one of the cutest "Carpool Karaoke" moments we've seen yet. #relationshipgoals

Miley and Liam apparently reunited over the Christmas holidays last year after breaking off their engagement in 2013. Although Miley quickly resumed wearing the engagement ring Liam gave her, rumours of an in-the-works Byron Bay wedding have yet to be confirmed.

We're a little surprised that Hollywood action guy Liam appears to be a Belieber, but maybe his in-sync harmony with Miley bodes well for their romantic future.