AP ShowBiz Minute.

Lady Gaga's postponed four shows after a severe case of joint inflammation has left her unable to walk.

The pop star tweeted that she injured herself during a performance some time ago and her condition has worsened over the last month.

Makeup dates for the missed shows will be announced later with the remainder of the tour expected to continue on schedule.

Alec Baldwin and his wife are expecting their first child.

Hilaria Baldwin wed the actor last June after a three month engagement and is due to give birth late this summer.

Alec Baldwin already has a seventeen year-old daughter, Ireland, from his previous marriage to actress Kim Basinger.

Another celebrity couple expecting a child are Penelope Cruz and Javier Bardem.

It will be their second child - the actors already have a baby boy called Leo who was born in January twenty-eleven.

This is Sid Dixon with AP ShowBiz Minute.

AP Entertainment

New York, 10 February 2010

1. Fashion shot of Lady Gaga

AP Entertainment

Los Angeles, 31 January 2010

2. Wide shot of Lady Gaga

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Tokyo, Japan, 23 June 2011

3. Various of Lady Gaga posing for photographers and holding up arm wearing Japan aid band on wrist

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Makuhari Messe - Chiba, Japan - 25 June

4. Wide shot of Lady Gaga in a news conference at the MTV Music Video Aid Award and posing for the photographers

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Los Angeles, 27 January 2013

5. Medium of Alec Baldwin and wife Hilaria arriving at the SAG Awards

6. Medium of Alec Baldwin talking to a reporter

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Los Angeles, 14 June 2012

7. Actress Penelope Cruz speaking to reporter

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London, 23 October 2012

8. Close of Javier Bardem talking to reporter