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Pop star Lady Gaga is always a show-stopper on the red carpets with her outrageous outfits and Giorgio Armani has taken notice.

Gaga and Armani joined forces to design some looks for her Monster Ball Tour, which kicked off last week in the UK. "We hear Lady Gaga's music everywhere we go, it is like a soundtrack of our times. In addition to her formidable songwriting skills, she is a modern fashion phenomenon," the designer said of the fashionista.

This isn't the first time Armani has collaborated with the singer. Gaga donned a series of outfits specially made for her by the designer at this year's Grammy Awards.