"I'm not going to lie. Working out sucks. Which is why I love taking classes, because I'm surrounded by other people and that keeps me motivated and accountable. These days, I do power yoga with light weights in a 105-degree room, so it's a mix of hot yoga and strength training. I also spin. The key for me is good music, like 2 Chainz, Lil Wayne, Rihanna, JAY Z, Beyonce." Jessica Alba relies on her favourite tunes to give her the motivation she needs to work out.