But now, the raven haired star has said she is in fact 100% straight, and on the hunt for a husband.
Speaking to The Mirror newspaper, Jessie said: 'For me, it was a phase. But I'm not saying bisexuality is a phase for everybody.'
'I don't regret anything I ever said, but I never knew back then whatever I said became a fact that I couldn't change.'
'I want to stop talking about it completely now and find myself a husband.'
And the British singer, 26, says she now finally understands all the chick flicks that had 'never made sense' before.
'It's a true struggle…Sex and the City is real!'
Jessie took to Twitter over the weekend to say that she has done a lot of growing up in recent months, and now slightly regrets being so vocal about certain issues.
'Remember the thing that you tried/did back in the day. The phase you had? That is so not YOU anymore' she wrote.
'I have those too. Yet I've noticed some people hold onto mine because they were blogged and put into the media. Fame doesn't stop people evolving and growing up. Defining me by old news. Sometimes making me feel like I can't go against something I said 5/6 years ago!'
The star continued to say that she'd grown up a lot, and finally feels 'more comfortable in my own skin now than ever before.'
She also urged her fans to be careful about using any celebrity as a role model, saying: 'Be your own role model. Be you. Watch what your doing, Focus on you. Be inspired by all means by anyone you want but don't think you can dictate their actions to suit your needs.'