This video is from a recent Blind Audition on The Voice of Ukraine. Ziandzha/Sianga is a singer formerly known as Boris April. She's now apparently Ann (Anya?) April. Did I first blog about her in September 2012?
Frankly, the voice seems dubbed in that video -- not live.
This is Sianga performing a duet -- or perhaps it is a singing duel. Both songs are in English, which I like. Some of her recent performance videos are not in English.
And Mamma Mia!
I'm not sure if any of the Instagram accounts are really hers. But you can find new and old pictures there.