It’s a mistake to think that all the money Lady Gaga makes goes straight to yachts, mansions and exotic traveling. The singer made clear that everything she earns is invested on her own work. "I spend each dollar I earn with music. I couldn’t care less about money", she said on an interview to a North American website. If she is really investing all of the US$ 200 million the "Monster Ball" tour earned, it is explained why her career goes so well…