The singer, 26, has kept a dignified silence since supermodel Gigi went public with former One Direction star Zayn Malik... Until now.
In an interview with The Mirror, Joe seems to bristle at comparisons between himself and Zayn.
He also admits he thought Gigi moved on 'quickly' from their five-month relationship.
Choosing his words carefully, Joe says he thought it was 'interesting' when Gigi started dating Zayn just weeks after she split from him.
Joe, who split with Gigi in November, says: "I think it's interesting that she moved on so quickly, I mean it was definitely very quick."
The star, who found fame with his siblings in the Jonas Brothers, also laughs off comparisons with his love rival.
He adds: "It's comical that I'm compared to him. That dude and I have been compared for years, I think it's just funny. To be honest I haven't really listened to his music, but he can sing well."
Joe insists he is now concentrating on his music career with new band DNCE, who have debuted with their single 'Cake By The Ocean'.
He is currently in the UK on a promotional tour for the band's new album.
Meanwhile, Gigi celebrates her 21st birthday today (23 April).
She and Zayn recently cemented their relationship by appearing in a joint shoot for Vogue.
Last month, she lashed out at a Twitter user who accused her of having multiple boyfriends.
The supermodel had taken to social media to post a photo of boyfriend Zayn, when a user responded: "Practise how to walk properly instead of having a new bf every 2 weeks."
Gigi decided to respond, firing back with: "I've dated 3 guys in 3 yrs, hun. My walk can always get better; I hope the unrelated bitterness in ur heart can too."
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