Punjabi folk sung by Reshma titled 'Akhian nu rehen de'.
http://www.youtube.com/watch?v=I-H1W-sNiyw
Lyrics and music (ditto) were used by Laxmikant Pyarlal in the
chartbuster movie 'bobby' and one of all time favourites.
http://www.youtube.com/watch?v=nTkrvKgwL1w
Another example is Punjabi / Rajhistani folk song sung by Reshma 'way
mein chori chori'
http://www.youtube.com/watch?v=hWM8tKYRPbg
Same composition was used in the movie 'lekin' by Hridayanath
Mangeshkar in the song 'yara silli silli'
http://www.youtube.com/watch?v=eC92n0wXs8k
There is a difference between 'sadaa churiyan da chamba' lyrics and
composition. Poetry is punjabi folk and is in public domain, just like
bulleh shah's sufiyana kalam/poetry. The tune, however, is artist's
own invention.
The same tappa is sung by Gurdaas maan, Tufail Niazi, Reshma, Arif
Lohar and Mussarrat Nazir. All of them sung the tappa in their own
composition.
Gurdaas man
Tufail Niazi
http://www.youtube.com/watch?v=kQDokFw9i78
Reshma
http://www.youtube.com/watch?v=JJgf6WTDEGo
Mussarat Nazir
http://www.youtube.com/watch?v=H8s9vxwG_-A
Now Himesh Reshammiya used Mussarrat Nazir's composition in his song
'chher de pyar ki baat' which should be termed plagiarism.
Himesh's song (listen from 1:16)
http://www.youtube.com/watch?v=gvdM5aiIOXY
There are innumerable other examples like nimbua (HDDCS by ID), will post more in this category.
All finds are hard wok of guy called Jamshid, who is working for folk songs getting due credit.