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The couple have been dating for four years (Image: Getty Images)

Heavily pregnant Katy Perry shows off huge baby bump in gorgeous Instagram post

Katy Perry's fiancé Orlando Bloom's ex Miranda Kerr commented on the pic

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Pop star Katy Perry has had a tumultuous love life but it seems she has finally found true happiness with actor Orlando Bloom. 

The Roar singer,35, is engaged to the Lord of The Rings heart throb and the couple are expecting their first child together.

Orlando, 43,  has an eight-year-old son Flynn with supermodel Miranda Kerr, while  Katy has recovered from her bitter divorce with comedian Russell Brand  - which ended after just 14 months in 2011.

Katy hasn't confirmed the due date but judging by her Instagram post - the mum to be hasn't got long to wait!

The songstress posted a pic of herself from Florida in a floor length silver gown - with her hand resting on her bump.  Orlando's ex Miranda was one of many to comment on the photo calling Katy a "gorgeous baby mama".

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Katy Perry shows off baby bump on Instagram and fiance Orlando's ex leaves gushing comment

She dressed for the SpaceX and NASA Launch  she was scheduled to host a pre-event livestream on the Discovery Channel this week. The event will see astronauts  launched into space from U.S. ground  for the first time since 2011.

Due to weather conditions the takeoff will now take place  this Saturday ( May 30).  But at least fans were treated to a sight of  blossoming Katy.

The 35 year old posted: "Welp. Today’s  #SpaceLaunchLive  was BUMPED due to weather, but what’s two days when  @spacex  has been waiting for 18 years... Let’s pray it’s in the cards for Saturday!"

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Katy Perry and Orlando Bloom at the wedding of Ellie Goulding and Caspar Jopling last summer (Image: PA)

Katie and Orlando have had an on off relationship since they were spotted flirting at an event in 2016. They became a couple within months but by March 2017 they had split up.

Months later they were back together.

A source told The Sun at the time: “Katy wants to make things work this time around. She tried, but she couldn’t cut him off. She cares too much about him. This time, they’re keeping things low key – but they’re back together.”

The pair got engaged on Valentine's Day.

Katy confirmed her pregnancy in March, tweeting: "Omg so glad I don't have to suck it in anymore... or carry around a big purse lol."

Katy recently released the single Daisies earlier this month.