>> bingo. look you up. >> reporter: 31-year-old amy who doesn't want us to use her last name or use her face says she's guilty of doing it. >> i google pretty much everyone, my exes and if i know who they are dating, i might google them, too. >> reporter: she looks up her most recent ex about once a week. >> it's probably a little out of control that i google my exes, but i think everyone does it. >> reporter: cybersnooping has become quite common. almost 50% of young adults have used social networking sites to check up on someone they dated in the past. >> it's very hard to resist looking. if it's out there, i want to see it. >> reporter: relationship expert dr. stacey kaiser says occasionally searching for a former flame is totally normal. >> it's healthy and normal to be curious about an ex and want to google them. it becomes unhealthy when it's hurting your current relationship or impacting your