Rubbernecker (noun)

A person who stops to look at something interesting while passing by, especially a passerby who slows down to look at an accident or other emergency.

Origin:

From the phrase rubberneck, which is an americanism dating back to the early 20th century, which refers to the act of craning one's neck to see something of interest.

Examples:

1. The accident on the highway attracted a crowd of rubberneckers, slowing down traffic even more.
2. She was a rubbernecker, always looking for an interesting story to report on.
3. The parade was filled with rubberneckers, all trying to catch a glimpse of the celebrities.
4. The rubberneckers were causing a traffic jam, as they slowed down to look at the construction.
5. The rubberneckers were gawking at the celebrity's house, trying to catch a glimpse of them.