As you already know I like Sam Tsui and KurtHugoSchneider and their work. I found 2 videos featuring their friend Allison singing and she is great!
Check them out and hope you like em!
"Tik Tok" by Ke$ha, sung by Allison and music by KurtHugoSchneider
"Hallelujah" by Leonard Cohen, sung by Allison and music by KurtHugoSchneider
ENJOY!! Until later sugar plums hahah