This tag implies that the bands and artists are Serbian or originated in Serbia. Music represented by this tag is often highly commercial. Other, possibly better, Serbian tags are, for example Novi Val or nova srpska scena.
For how long do I need to wear retainers? It takes time for the bone and all the tissues around your teeth to reorganise and therefore it is necessary to use retainers until your bite stabilises. In the first month after the braces are removed, the risk of relapse is very high.
After the braces come off however, there is no such control. The forces of occlusion, wear, and the tongue come back into play. Even if the teeth are held in place with a bonded retainer after appliance removal, the position of the teeth will still change with time. Retainers are the key to preventing tooth movement.