Sabrina Carpenter, Lady Gaga and Mariah Carey will hit up the MTV VMAs Sept. 7. But there was a time duos like Nick Lachey, ...

Sabrina Carpenter, Lady Gaga and Mariah Carey will hit up the MTV VMAs Sept. 7. But there was a time duos like Nick Lachey, Jessica Simpson, Justin Bieber and Selena Gomez attended the iconic night.

A gas leak can cause symptoms like headache, nausea, and death. Smelling gas is an emergency. If you can't easily identify a source, leave your home and call 911.