A true polyglot he is (writes and speaks more than 10 Indian languages) with flawless diction in most of the languages, has had success outside his native state Andhra. His popularity in Kannada films during late 50's to mid 70's was so much that he is claimed to be a kannadiga by many. The key to his success was the total identification that arose between his voice and Rajkumar, the dominant male star of the industry. (In Tamil PBS is identified with Gemini.) The range of songs PBS sang paralleled the range of roles done by Rajkumar (mythological, historical, social, fabulous, mystery, espionage, every genre one can come up with). It is said that the process of merging of the singer and the actor was far more complete than in the case of Raj kapoor and Mukesh. PBS is also popular in Hindi thru "Main Bhi Ladki Hun" (remake of "Naamum oru penn") songs like "Chanda Se Hoga Wo Pyara, Phulon Se Hoga Wo Nyaara", a duet with Lata. Chitragupta was the music director.
An often unknown facet of PBS is his literary skills. He comes from a poet's family and is wellknown in Telugu literary circles. He also composes songs in Tamil, Hindi, Sinhalese and Urdu. In fact, his Urdu ghazals have been acclaimed by the NorthIndian Ustads.
Some people claim PBS to be a muslim(probably because he sports the kind of a cap usually favoured Muslims), which is not true.
PBS Songs List
A thread on PBS