No, Usher does not have any shares in the New Jersey Nets. However, Jay-Z does have a share of the team, and Usher has a share in the Cavaliers.
NBA basketball team
The NJ NETS won 12 games in the 2009-10 season and had a final record of 12-70
The Lakers swept the NJ Nets, winning the last game in NJ
The New Jersey Nets have 6 wins and 53 losses. (6-53)
the new york knicks
Jeff McInnis Orlando Woolridge
i believe there are 3 rappers/singers who own a basketball team. Jay-z owns part of the New Jersey Nets, and Usher owns part of the Cleveland Cavaliers, and nelly is part owner of the Charlotte bobcats
If Barclays Center isn't finished, the Nets will play at Morse Center at Asphalt Green (which is also called Murphy Center).
The Lakers played the New Jersey Nets in the NBA finals in 2001. The Lakers beat NJ 4-0 games in that series. They won their third consecutive NBA championship.
The official website of the New Jersey Nets is the best resource for such information. Alternatively, Wikipedia is a good source for team history, and ESPN is a good source for the latest news and updates.
The Meadowlands Sports Complex, home of the NBA's New Jersey Nets, is located in East Rutherford, New Jersey.