"Glassheart" is a song conceptualised by Leona Lewis and a frequent collaborator who is the lead vocalist for what pop rock band?
Glassheart (song): "Glassheart" is a song recorded by British singer-songwriter Leona Lewis for her third studio album of the same name (2012). Glassheart (song):  The song was conceptualised by Lewis and frequent collaborator Ryan Tedder at his family home in Denver, Colorado. Ryan Tedder: Ryan Benjamin Tedder (born June 26, 1979) is an American singer, songwriter, musician, multi-instrumentalist, and record producer. Ryan Tedder:  As well as being the lead vocalist for the pop rock band OneRepublic, he has an independent career as a songwriter and producer for various artists, including Madonna, U2, Adele, Beyoncé, Maroon 5, Demi Lovato, Ariana Grande, Kelly Clarkson, Jennifer Lopez, Westlife, Ed Sheeran, One Direction, Big Time Rush, Camila Cabello, Taylor Swift, Leona Lewis, Zedd and MØ.
OneRepublic