Back in 2007, Britney Spears was a laughing stock.
She went from a teen idol to constantly getting herself into problems. Everybody was laughing at Britney Spears in 2007. Since then, her career has had a rebirth and nobody's laughing anymore.
During that time, Craig Ferguson made a lot of jokes at Spears' expense. Every comedian did.
But, he eventually realized that enough was enough. Ferguson noted Anna Nicole Smith. Everybody laughed at her when she needed help.
Justin Bieber may or may not need help. But, you could perhaps apply the same thoughts to his story.