Lady Gaga has become the first pop artist to be viewed on YouTube more than a billion times. Three of the singer's promos have become favourites on the site - 'Poker Face' has received 374,606,128 hits,her debut 'Just Dance' stands at 272,941,674 and 'Bad Romance' has been watched 360,020,327 times. It makes the 24-year-old singer the first featured artist on the website to total more than a billion views,reported Contactmusic. But she may not hold the record for long - clips from the 'Twilight' film franchise have been watched 980 million times,while Soulja Boy's hits have clocked up 860 million views,according to video analytics company Visible Measures.