I'm a good singer, but my sis claims she's better. I KNOW i'm better. What can I do? Please help!!!

Just ignore her. I know it's hard, (trust me, I grew up in a house of 7 kids) but sometimes it's what आप gotta do. As long as आप have confidence in yourself, that's really all that matters.

But, if you're serious about proving who's better, आप could have a contest. Each of आप sing to a randomly selected friend/relative and let them decide. Or, if आप don't like गाना in front of people आप could record yourselves.

There is really nothing आप can do if someone is being immature in that way. Ignore her. आप have nothing to prove.

Do a गाना contest to know which one's better. या record both of your voices गाना and judge which one's better.

have a गाना duel challenge her have your फ्रेंड्स and family choose

Just say "You know what! That is super mean whether I am a good singer या not! How would आप like it if I called आप a bad singer या कहा आप sing of key?"

Have a contest, and let who eva is watching decide! prove yo sis wrong and दिखाना off yo talents!!!!

Don't fret! No offence, but it's just a voice! It doesn't matter who's better, what matters is that you're both awesome in your own unique way!