Followers and Following
In the Singer's tab, each singer's picture is marked with the follower status. Please long press on any singer for an explanation of all the icons.
A singer can be in four categories: 'Follower', 'Following', 'Both follow', 'Only I follow'. On top of each singer's picture, you will see arrow_forward if you follow them and arrow_back if they follow you.
You will also see a refresh icon refresh next to 'Show singers'. If the app is in the process of updating the follower/following information, this icon will rotate. You can also tap it manually to update this information. Since this is an expensive operation, the app restricts this to be run at most once a day. If it has been less than a day since the last update, the icon would look like update_disabled.
If you have more than 10,000 followers (or following), many of the singers cannot be categorized right. This is because Smule has a 10K limit on fetching followers/following. Additionally, if you have more than 10,000 followers and if you follow more than 200 singers, "Both follow" and "Only I follow" will not appear. This is because, in this case, the app does not know who is not following you.
You can search for followers and following as explained here.