The ‘Dirrty’ singer - who is reportedly four months pregnant with her first child - speaks fluent Spanish and wants her child to learn the language. Christina said in an interview with InStyle magazine, “I definitely want my kids to know Spanish. And I’m taking my tapes on tour.”

Although the singer’s father, Fausto Aguilera, confirmed his daughter’s pregnancy last month, Christina is still reluctant to talk about it. When asked directly if she and husband Jordan Bratman are expecting their first child, she coyly replied, “It’s definitely something we can’t wait to begin.”

A joyous Fausto said last month, “I’m so excited. I want Christina to achieve all her goals. I wish her all the happiness in the world.” The Grammy Award-winning singer has been advised to take a break after she recently collapsed on tour in Australia, and admits she is enjoying resting up. Christina said, “Bed is my favourite place to be right now. “Seriously, I like to do everything in it, from eat to sleep.”

The cancellation of her two Auckland shows - on August 2 & 3 - is being blamed on a “flu virus” that forced her to abandon two Australian shows. The Auckland concerts will not be rescheduled, and ticket-holders are being offered their money back. Fans who arrived at Vector Arena for her show were greeted by closed doors, dimmed lights and a sign that said “Frontier Touring Company regretfully announces that tonight’s show has been cancelled.”

In a press release, Aguilera apologised to her Kiwi fans. “I would like to apologise once again to all of my fans here in New Zealand for having to cancel my last two shows of my tour,” she said. “This is my first time in your beautiful country and I have really been looking forward to performing for you all. “Unfortunately, I caught a bad flu virus and I have not been able to recover in time. Thank you all for your continued love and support and I can’t wait for the next time.

Fans are disappointed the cancellations were made at 5pm on the evening of her first concert - just hours before she was due to take the stage. “People have incurred costs such as travel and hotels this is simply not on,” one fan said in an email to Stuff.co.nz. “I am absolutely gutted that this could happen at the last minute. She should’ve cancelled way before this,” said another. Other fans sympathised with Aguilera’s illness. “I wouldn’t have been able to enjoy the concert, as I would have been thinking, ‘is she going to collapse … is she okay right now?’,” a concerned fan said. “At the end of the day, it’s her health and baby at risk, and she’s got to look after herself.

Refunds for both shows are available from Ticketmaster from Friday, August 3, at 9am.