Complex sentence: Braxton has won six Grammy Awards, seven American Music Awards, and five Billboard Music Awards and has sold over 60 million records worldwide and is the greatest selling solo R&B artist of all time.
Split into simpler sentences: Braxton has won six Grammy Awards, seven American Music Awards, and five Billboard Music Awards and has sold over 60 million records worldwide. Toni Braxton is the greatest selling solo R&B artist of all time.