Janay Rice -- Worst Year Of My Life Is Over ... Now Let's Dance!

To say 2014 was a rough year for Janay Rice is an extreme understatement ... which is probably why she ushered in the new year with a dance party.

Janay -- along with about a dozen other ladies -- recreated Beyonce's "7/11" last night ... while sporting some "Happy New Year" gear.

Earlier in the night, Janay spent some time with her husband Ray Rice and their daughter ... posting a family photo along with the caption, "Happy New Year from my family to yours."