The stars you see acting on screen rarely sing in the songs, too. When you think about the beautiful voices in the songs it's mainly names like Sonu Nigam, Udit Narayan or Shreya Goshal doing the good job. Nevertheless, there are some exceptions, for example Amitabh Bachchan has sung many of his filmi songs in the last three decades. Sanjay Dutt, Shahrukh Khan and Govinda can be heard as well.
In some of these songs Govinda really sings, sometimes it's just a little bit of talking inbetween the real vocals or some mere rap parts.

Here's a (hopefully) complete list of Govinda's playback parts up to now. It's said that Tandon makes him sing for Loot again after a long time.

2003 Sandwich – Bahut Chalu (Govinda, Sonu Nigam, Hema Sardesai)
2003 Raja Bhaiyan - Sunday Manao (Govinda)
2002 Waah! Tera Kya Kehna – I Want Money (Govinda)
1999 Pop-Album with Kamini Khanna
1999 Haseena Maan Jayegi – I Love You Bol Daal (Govinda, Sanjay Dutt, Sonu Nigam, Alka Yagnik, Sudesh Bhosle)
1996 Apne Dam Par - Aarah Hiley (Govinda)
1994 Dulaara – Aarey Ek Hai Anaar (Meri Paant Bhi Sexy) (Govinda)
1993 Aankhen – Bade Kaam Ka Bander (Govinda, Chunkey Pandey, Kumar Sanu, Mhd. Aziz, Aroon Bakshi)
1992 Shola Aur Shabnam – Gori Gori Baanki (Govinda)
1991 Karz Chukana Hai – Tere Haathon Ne Chhua (Govinda, Amit Kumar, Sapna)

Labels: govinda, haseena maan jayegi, playback, raja bhaiyan, shola aur shabnam