Miranda Sings is an Internet character created in 2008 by American comedian, actress and singer Colleen Ballinger.[1] Ballinger displays videos of the comically talentless, egotistical and quirky character on her YouTube channel under the username mirandasings08. On these videos, the character sings badly and rants about her critics, the "haters". Ballinger also featured the character on a second YouTube channel, Mirandavlogz, in videos where the character discusses a topic or gives a tutorial of the day. The two YouTube channels have received more than 32 million and 5 million total views, respectively.

From: Miranda Sings - Wikipedia, the free encyclopedia
I love her! She's so hilarious but some people who don't know her keep hating on her. Oh well, haters back off. Make sure to check her Youtube channel, mirandasings08.