Rita Ora's relationship with Calvin Harris doesn't quite "fit".
The chart-topping pair are currently enjoying a high-profile romance, documented by their loved-up Instagram pictures together and cosy date nights.
However, sources say the relationship is doomed thanks to their high-flying lifestyles.
"They both have such hectic schedules, so their lives don't seem to fit together as much as they would like them to. Calvin has a residency in Las Vegas and works a lot in Ibiza, while Rita's based in London and flies to LA a lot," a source told UK magazine Heat.
The insider also added that Rita and Calvin have conflicting outlooks on how they like to spend their time together.
"She's always getting papped around town, whereas he's much more private," the insider added. "He sometimes finds her intense friendship with 'wifey' Cara Delevingne and that gang a bit too much to handle. When the girls get together there doesn't seem to be much room for him."
Earlier this year, Rita's pals reportedly raised concerns about her relationship with the outspoken British DJ-and-producer, who is well known for publicly feuding with stars on Twitter.
"It looks like a serious case of history repeating itself. The last time Rita was with a guy who let it all out on Twitter was Rob [Kardashian] - we all know how that ended," an insider told UK magazine Look. "She put on a brave face but, trust me, that hit her hard. Her friends are worried she's going to end up seriously hurt."
