Lady Gaga found performing in a dress designed by her sister to be a "joy." (Bang)

Lady Gaga found performing in a dress designed by her sister a "joy".

The 29-year-old star - who is infamously known for her outlandish eccentric style and bold statement outfits - had a number of costume changes during her concert at the Hollywood Bowl in California with Tony Bennett on Saturday (30.05.15) but her favourite was a pink gown adored with a giant bow at the waist which had been created for her by younger sibling Natali Germanotta and her costume designer Perry Meek.

She tweeted alongside a photo of herself in the dress: "What a joy singing La Vie En Rose in a dress made by my sister Natali Germanotta & Perry Meek @aussiegearla (sic).

The 'Telephone' hitmaker donned a number of spectacular sequinned creations for the concert - in which she and her 88-year-old friend performed a number of jazz standards and tracks from their 'Cheek to Cheek' album - and stunned the crowd with a particularly daring red sheer-bodiced halter dress with a feathered skirt, which she wore during 'I Can't Give You Anything But Love'.

She joked of the revealing gown: "Sorry, Tony."

Lady Gaga (

And Gaga confessed midway through the show that it was a "total dream" for her.

She said: "This is a total dream tonight. Thanks for being here with me, Tony."