More than a quarter (27%) of Americans age 50 and over use social media websites, with Facebook being the most popular, followed by MySpace, LinkedIn and Twitter, according to new research from the AARP.

"The latest data tells us that more and more, social networking is becoming a part of everyday life for Americans 50+, and boomers in particular," said AARP Chief Communications Officer Kevin Donnellan.

The AARP is expanding its online career service for workers over 50 and has partnered with RetirementJobs.com