It was during this year that The Three Degrees enjoyed their greatest success when signed by Philadelphia International Records and working with Gamble and Huff. Their first song under this label was "TSOP (The Sound of Philadelphia)", which was the theme song for "Soul Train". Under this label the group began to tour internationally. The self-titled "The Three Degrees" was released in 1973 and yielded hits such as "Dirty Ol' Man" (which went to #13 in the UK Singles Chart) and "Year of Decision" (which went to gold in the Netherlands and Belgium).