In China, rival service Renren Guangjie offers a marketplace with Chanel, Clinique, and other brands.
Amazon, Federated Media also see big gains in audience by year's end, comScore Media Metrix reports.
Nine of the 10 most popular U.S. web properties saw fewer users in April.
A look at the top 25 online properties in the U.S. during January, ranked by unique users.
A look at the top 25 online properties in the U.S. during November, ranked by unique users.
A look at the top 25 online properties in the U.S. during October, ranked by unique users.
A look at the the top 25 online properties in August, according to comScore.
Yahoo Sports is beating rival ESPN.com for traffic that's specific to the global soccer event. But each have benefited from the unprecedented American fervor for the World Cup during the past two weeks.
According to Hitwise, three segments of the U.S. Hispanic population were more likely to visit World Cup-related content than the overall online population.
U.K. users visited social networking sites more than they did search engines during May, according to Hitwise.
Video content on the social network continues to reach more users, while audiences on Hulu, Yahoo, AOL and Microsoft contract.
Google sees a gain in usage during April thanks largely to YouTube, according to Nielsen.
Unique visits to Facebook grew by an estimated 69 percent between March 2009 and March 2010, according to Nielsen.
Research firm reports burgeoning social site now only trails Google.
U.S. unique monthly visitors to Facebook grew 96.5 percent between January 2009 and January 2010, according to data from comScore.

June 6, 2012
1:00pm ET / 10:00am PT