In a surprise decision, Delhi Chief Minister Arvind Kejriwal won't hold any portfolio but oversee the work of all the ministers, Deputy Chief Minister Manish Sisodia announced Saturday.

The largest number of departments will be with Sisodia, including those of finance and power which were to have been held by Kejriwal.

The Kejriwal-led new Aam Aadmi Party (AAP) government will focus on curbing corruption, controlling price rise, and providing uninterrupted power and water, Sisodia told the media.

"Our top priority will be to serve the people in the best possible manner," he said, shortly after Kejriwal and his ministers drove to the Delhi Secretariat after taking oath at the Ramlila Maidan.

A long-time confidant of Kejriwal, Sisodia will now hold finance and planning, services, education, IT, technical education, administrative reforms, urban development, revenue, land and building and vigilance, and all other departments not allotted to any minister.

"Kejriwal will not hold any portfolio," Sisodia said, four days after the AAP won a sweeping victory in the Delhi assembly election.

"Kejriwal will oversee all ministries through modern technology. He will try to bring systemic changes," Sisodia said.

Kejriwal will connect with the people, Sisodia said. "He will meet people to know what their problems are. He will also oversee the MLAs."

Satyendra Jain, who like Sisodia was in the earlier 49-day Kejriwal government, would be the health minister and be in charge of industries, irrigation and flood control, public works department.

Gopal Rai, one of the four new faces in the Kejriwal ministry, will look after the departments of employment, development, labour and transport.

Jitender Singh Tomar has been given law and justice, tourism, art and culture, as well as home.

Asim Ahmad Khan gets food and supply, environment and forest, and election.

Sandeep Kumar will take charge of the departments of women and child, social welfare, language, and Scheduled Caste and Scheduled Tribe.

Kejriwal again sings Manna Dey song

Delhi Chief Minister Arvind Kejriwal capped his speech at his oath-taking ceremony here Saturday by singing a few lines of a song of brotherhood - the same Manna Dey song which the AAP leader sang at the Ramlila Maidan in 2013.

"Insaan se insaan ka ho bhaichara, yehi hai paigam hamara (People should have brotherly relations, this is our message)," he sang to loud cheers.

"Har ek mahal se kaho ke/ Jhopdiyo me diye jalaye/ Chhoto aur bado me ab/ Koi phark nahi rah jaye. (Every palace should light up lamps in huts, and there should be no differences between rich and poor)."

The revolutionary song, sung by Manna Dey and penned by Pradeep, is from an old Bollywood film, "Paigham".

When Kejriwal sang a song during his oath-taking ceremony in 2013, he broke convention as it was quite unlike what any chief minister has done in India until then.

On Saturday, he once again struck a chord with the 'aam aadmi' by singing the song.

Kejriwal and his ministers

The following is a brief profile of Delhi Chief Minister Arvind Kejriwal and his ministers:

Arvind Kejriwal (46): A mechanical engineer from the Indian Institute of Technology-Kharagpur, Kejriwal has been involved for long in anti-corruption campaigns. He won the Ramon Magsaysay award, considered Asia's Nobel Prize, in 2006. He became a household name when he was a key aide to Gandhian Anna Hazare when the latter launched an anti-corruption movement in 2011. A former Indian Revenue Services officer, he formed the AAP in November 2012 and became Delhi's chief minister in December 2013 after leading it to a spectacular showing in its maiden election. He resigned in February 2014 after 49 days in power. He contested against Prime Minister Narendra Modi in the Lok Sabha election and lost. But he rebuilt the AAP and led it to a sweeping win in the Delhi assembly election Feb 10.

Manish Sisodia (43): A former journalist who turned an activist, Sisodia is widely seen as Kejriwal's right hand man. After Kejriwal decided not to hold any portfolio and instead oversee the AAP government and interact with people, Sisodia becomes the most powerful minister. He is expected to run the day-to-day affairs of the government while Kejriwal monitors the larger picture.

Gopal Rai (38): A former activist of the All India Students Association (AISA), the student wing of the CPI-ML, Gopal Rai joined the AAP and is now a member of its National Executive. He is partially paralyzed as he suffered a bullet would in his student days. He lost the 2013 Delhi election. Months ago, he had a verbal spat with former Indian Army chief V.K. Singh in the presence of Anna Hazare who asked Rai to leave Ralegaon Siddhi.

Asim Ahmed Khan (38): He defeated five-time legislator Shoaib Iqbal from Matia Mahal, a Muslim-dominated constituency in Old Delhi. According to the AAP web site, Khan has been a part of many social activities in the fields of education, health and culture.

Satyender Jain (49): He was the health minister in the 49-day Kejriwal government of 2013-14. The legislator from Shakur Basti is an architecture consultant. He quit his job with the Central Public Works Department to join the Anna Hazare movement. He is also a social activist.

Jitender Singh Tomar (48): He is an advocate by profession and a former Congressman who joined the AAP in 2013. He was defeated in the last Delhi election by the BJP candidate from Trinagar.