At the start of this year, 21-year-old singer Lamb set herself the challenge of posting her music on social media every day. Her life at the time is captured in a series of numbers that she rattles off with ease: waitressing for $18 an hour (in LA, no less), 600 followers on Instagram and 21 monthly listeners on Spotify. By the end of February, she’d received co-signs from Drake, Russ and SZA,hellip;read more raquo;