SAN FRANCISCO, California, United States?Lady Gaga has dethroned Britney Spears as "Twitter Queen" with more than 5.7 million followers on the micro-blogging site and promised on Monday no online celebrity nonsense during her reign.

An "inaugural message" posted by the pop music diva at her official YouTube channel had been viewed 345,145 times by Monday afternoon.

"Thank you for beginning my reign as Twitter Queen," Lady Gaga said in video that showed her sitting at a make-up table backstage with a lacy crown atop her head and a glowing wand in one hand.

"I vow never to partake in online shenanigans and I vow to always tweet and tweet again."

Lady Gaga, whose birth name is Stefani Germanotta, posted the video after getting word that she had replaced singer Spears as the person with the greatest following at micro-blogging service Twitter.

The music star known for creative outfits had 5,750,270 followers at Twitter as of early Monday in California, while there were 5,712,098 people signed on to receive musings or other terse missives fired off at the service by Spears.

Others in the club of Twitter users with more than five million followers included US president Barack Obama and celebrities Ashton Kutcher and Ellen DeGeneres.

As with fame, popularity at Twitter is subject to the whims of fans.

"May you always have cropped cuticles while tweeting and may you never have carpal tunnel," Lady Gaga said, referring to a repetitive stress injury sometimes caused by too much typing.