I agree. I've always enjoyed Rainbow Dash's singing voice. She needs to sing more in the future. 

She's got an alright voice - certainly not the creme de la creme of the show, but she's gone 4 seasons without having a solo song. There's no need for that. She needs a song, dammit, because 'murica or something like that

I love it whenever her voice cracks. It's absolutely adorable  

She's got an alright voice - certainly not the creme de la creme of the show, but she's gone 4 seasons without having a solo song. There's no need for that. She needs a song, dammit, because 'murica or something like that

She's better than alright, she's great!  I mean, she's nor Rarity, I'll give you that, but still great.  I think if I was rank the 6 for singing voices, I would have to go with:

1. Rare

2. Twi

3. RD

4. Flutters

5. Pinkie

6. AJ

Fluttershy definitely has a gorgeous singing voice, but there's just something so charming about RD's voice that puts her a little ahead of Flutters for me.