Musician Youssou N'Dour has announced he is running in February's presidential elections in Senegal."I have listened... and I am responding favourably," Mr N'Dour said on his own TV network, referring to requests that he put himself forward, AFP reports.Mr N'Dour will run against incumbent Abdoulaye Wade, who is seeking a controversial third term.Mr Wade's bid and changes he proposed to the constitution have prompted widespread unrest in recent months.Senegal is seen as one of the most democratic and stable countries in West Africa - it is the only country in the region never to have experienced a military coup.However, tension is rising ahead of the election and one prominent politician has been charged with murder.Mr N'Dour said of his candidacy: "It is a supreme patriotic duty."It's true, I haven't pursued higher education, but the presidency is a function and not a job."I have proved my competence, commitment, rigour and efficiency time and time again. I have studied at the school of the world. Travel teaches as much as books," he added.Election controversyProposals made last June by Mr Wade to change the constitution sparked the most violent protests of his 11-year tenure.Mr Wade had wanted to reduce the proportion of votes needed to win a presidential election, and so avoid a run-off - from more than 50% to 25%.He had also wanted to create an elected post of vice-president, which many suspected was meant for his son Karim.Many opposition activists claim Mr Wade's bid for a third term is unconstitutional.He has been president since 2000 when he won elections, ending 40 years of rule by the Socialist Party.Mr N'Dour has emerged as a prominent opposition figure in recent months.He has also long been involved in humanitarian causes, being a goodwill ambassador for the United Nations Children's Fund (Unicef). Last year he also criticised African leaders over their response to the famine in Somalia.Mr N'Dour is renowned around the world for his fusion of traditional Senegalese music with salsa, jazz and hip-hop.His 1994 duet with Neneh Cherry, Seven Seconds, was a worldwide hit and won a Grammy nomination.