Selena Gomez has revealed her "happiness" on Instagram only days after cancelling a tour.

The US star recently pulled the plug on a February tour of Australia because she felt the need to spend more time on "herself".

Rumours spread about the reasons behind the shock move, but it seems a weight has been lifted from her mind.

Gomez uploaded a photo of herself on Sunday (December 22) holding a baby along with the caption:

"I'm the happiest I've been in a while..So blessed and thankful for the future, for release and to finally be happy for those I loved..."

The singer's full cancellation statement meanwhile was as follows: "My fans are so important to me and I would never want to disappoint them. But it has become clear to me and those close to me that after many years of putting my work first, I need to spend some time on myself in order to be the best person I can be."

Gomez added: "To my fans, I sincerely apologise and I hope you guys know how much each and every one of you mean to me."