Singer Rihanna is celebrating her 24<sup>th birthday on Monday.

The "Umbrella" hitmaker made her debut in 2005 with the album "Music of the Sun", that was in the top ten of the Billboard 200 chart

Many of her friends and fans took to twitter to wish the birthday girl.

Singer and ex-boyfriend Chris Brown tweeted, "HAPPY BIRTHDAY ROBYN!"

A tweet from paulie fenty Trendeh, "Happy Birthday Rihanna. Only 24 & already have made your mark in music history! We are so proud to be fans! You are BEAUTIFUL inside & out!"

The Illuminati @ThelIluminati tweeted,

"Happy Birthday to our loyal sister @Rihanna She has been with us since day one and nothing but success has followed. Happy Birthday Rihanna."

Rihanna tweeted back, "Ahhhhhhh ALL MY BDAY wishes from my DM to my TL!!!! KRAY! I truly love u guys, thank you so much #RihannaNavy for makin me feel special."

Rihanna, fondly called as RiRi, has consistently vowed her fans with her unique voice and has won several accolades and awards to her credit.

Her other albums including "A Girl Like Me", "Good Girl Gone Bad", "Rated R", " Loud", all have been great hits.

In particular, her third album," Good Girl Gone Bad", was nominated for nine grammy awards for producing international hit singles like "Umbrella", "Don't Stop the Music", "Take a Bow" and "Disturbia". She won the Best Rap/Sung Collaboration for "Umbrella".

Rihanna, who is much talked about for her sexy costumes and ever-changing hair styles, has earned five American Music Awards, three Grammy Awards.

She split from Chris Brown after he beat her badly, so that she had to be admitted to hospital for multiple injuries in February 2009. But it is said that she has reconciled with him, after there were reports that she invited him for her birthday party.