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.
Late to the party but here's my answer: Depends how much they moved your teeth during braces - usually 10 days is fine but don't forget the lab needs some time to churn out a new retainer. Once you get back, see if your dentist can make you a new Essix (plastic) retainer out of a mold of your teeth.