Celebrities who threw other celebrities under the bus

Justin Timberlake threw Janet Jackson and Britney Spears under the bus. He let Ms. Jackson take the blame for the Sunday, February 1, 2004 Super Bowl performance. Her career fell. Justin Timberlake accused Ms. Spears for cheating on him without proof back in 2002. He threw so much shade at her back throughout the 2000s. I have 0 respect for him. He seems like a poser and a wannabe too, appropriating African American culture. 

I don’t know if this counts, but Chris Brown physically abused Rihanna in 2009.