It is available at Google.co.in/music
Google writes in the blog:
Bollywood music is innate part of our life both online and offline. Thatâ€™s why, every day, millions of users in India use Google to search for their favorite Bollywood songs – latest or classic. Users not only search for songs but also spend quite a bit of time to explore and discover new music on Internet. However this search and exploration has never been an easy thing.
This search engine is useful for listening to legal Bollywood Hindi songs. But, the support for Tamil and other regional sons are not available as they have not signed up with Tamil online music streaming services like raaga.com. This will surely reduceÂ piracyÂ as user will know where to get legal contents instead of downloading from illegal sites.