I can't use my AppleID for the update of my apps.
I'm stuck with a friend's ID. I can't even update apps that I've purchased with mine.
iPhone 4, iOS 5.1.1
If you need to sign into your device with your Apple ID go to
iOS 5.1.1: Settings > Store > Select your friends Apple ID and Sign Out, then sign in with yours.
iOS 6: Settings > iTunes and App Stores > Apple ID > Sign Out
To eliminate this issue, you should delete any apps off your phone that were not purchased with your Apple ID. Although it's possible to have apps from two different Apple ID's on one device, it's complicated and can get confusing.