It was reported in some narrations that Imam Mosa Al-Kadhim – our Seventh Imam (peace be upon him) – said to his one of companions: “If you have a request from Allah say: Allahumma inni As’aloka bi haqqi Mohammadin wa Alliyyin fa inna lehuma shaanan minash-shaan, wa qadran minal-qader, fa bihaqqi dhalikash-shaan wa bihaqqi thalikal-qader, an tosalli alla Mohammadin wa Aal-Mohammad wa an……." then you mention your request. The translation of the said supplication is: “O my Lord I ask you by the right of Mohammad and Ali as they have a (high) position amongst the positions and a (high) value amongst the values. By this position and this value praise be on Mohammad and his progeny and…” then say what your request is. There are other supplications mentioned in books of supplication.
If the paper towel is made of a substance upon which prostration is not correct, like cotton, then it is not permissible to prostrate on it. If it is made of a substance upon which prostration is correct, like wood, then it is permissible to prostrate on it. If the individual doubts or does not know the source of the towel then it is impermissible to prostrate on it.
If such music and singing is of the type that can arouse ‘tarab’, then it is prohibited to listen to; otherwise it is allowed. ‘Tarab’ means the psychological interaction with the music or singing, whether it leads to joy, sadness, pride or any other emotion.