Heart, Michael Bolton, John Mellencamp, Cyndi Lauper, Josh Groban, Imagine Dragons' Dan Reynolds contribute to anti-campaign ballad on 'Last Week Tonight'
Singer returns to late-night show with astounding follow-up to 'The Best Tweets of Kanye West'
Turnaround Arts, the program bringing instruments and arts education to low-income schools, grows to 54 schools nationwide
Middle-of-the-road pop guy makes another pleasant bore
Sam Smith, Pitbull, Iggy Azalea, Britney Spears, Blake Shelton and more confront their haters in the latest Mean Tweets segment
Celebrity chef's new web series also features interviews with Patti Smith, Perry Farrell and Josh Groban
Rufus Wainwright, Josh Groban and more take on "Summer Nights" in Toronto
Paisley joins Ludacris and Kesha as mentors on new series
Glenn Howerton and Josh Groban star in a story from 'Arrested Development' writer Brad Copeland
Grammy bumps forthcoming for Maroon 5, Bruno Mars, Lumineers
'Teachers Rock' set for August 14th at L.A.'s Nokia Theatre