She is legally blind and has a hard time understanding people when they talk. That however has not stopped this 90-year-old grandmother from dancing to the tunes of tremendously popular electro-pop duo LMFAO.

Adam Forgie, a YouTube user, filmed his grandmother dancing to LMFAO's Party Rock Anthem and uploaded it on the Web site on Dec. 15. The video has since gone viral, making it to the top of the list of most-watched videos, as on Friday.

I live with and take care of my grandmother. She is legally blind (severe macular degeneration) and like many people her age, also very hard of hearing. One of the few things that makes her happy is dancing! said Forgie, in a post accompanying the video.

I put this song on, and this is what she improvised. She's never heard this song before and this was not practiced, he wrote.

Forgie's YouTube channel has about 25 videos, several of them featuring his grandmother dancing to tunes of pop stars including Justin Bieber and Lady Gaga.

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