9. Meghan Trainor
Between the ages of 15 and 17 Meghan Trainor self-released three albums that she wrote and produced herself. She started attending songwriting conventions and it wasn’t long before she signed a publishing deal with Nashville-based company Big Yellow Dog Music. She worked as a songwriter-for-hire, writing music in the pop and country genres while she was still a teenager. She was still interested in recording her own music but didn’t have the confidence to continue to put herself out there.
She recorded some back up vocals for artists and wrote some songs for country artists like Rascall Flatts,Hunter Hayes, and Sabrina Carpenter. She originally offered the single “All About That Bass” to Beyonceand Adele, who both declined, so she decided to record it herself. It became a viral hit and went to number one in 58 countries, making it one of the best-selling singles of all time. Her major-label debut album, Title, was released in early 2015.