Adele is up for 18 Billboard Music awards.

The "Someone Like You" hitmaker leads the nominations with her huge haul which includes Top Artist, Top Female Artist and Top Billboard 200 Artist while her single "Rolling In The Deep" is a contender in seven song categories.

LMFAO received 17 nominations, while Rihanna - who was nominated in 18 categories last year - made the shortlist for 13 awards. Lady Gaga and Lil Wayne both received nods in 10 different categories and each will compete against Adele, Rihanna and Katy Perry for the prestigious Top Artist prize. Nominees for the Top New Artist gong include Bad Meets Evil, Big Sean, Foster The People, Scotty McCreery and Wiz Khalifa.

The awards - which features many additional categories - celebrate artists who have appeared in the Billboard charts between the end of February 2011 and March this year, with winners determined by album, single and digital sales, touring, streaming and data from social websites such as Facebook and Myspace. The Billboard Music Awards will take place at the MGM Grand Garden Arena in Las Vegas on May 20.