American pop star Adam Lambert's concert in Singapore on Friday has been given an "Advisory 16 and above (some mature content)" rating by the Media Development Authority (MDA).

This means the performance by the openly gay singer contains content that may not be suitable for younger audiences, but will not restrict admission by age.

The MDA explained on its website that the concert "will feature two songs from Adam Lambert's album Trespassing - Outlaws Of Love and Shady - whose lyrics are based on the singer's personal experiences and lifestyle".

The Straits Times reported last Saturday that the National Council of Churches of Singapore (NCCS) had received a complaint that a church-owned venue was hosting Lambert's concert, which may promote "the gay lifestyle".

The American Idol runner-up will perform his first full-length concert at The Star Performing Arts Centre, which is owned by a business arm of New Creation Church.

The Council said it had not received any complaints for Lambert's previous two showcases in Singapore in 2010 and 2011.

This is not the first time a pop concert has received a rating for mature content in Singapore. Lady Gaga's Born This Way Tour in May last year carried the advisory "some controversial religious content", which the MDA said was consistent with the Born This Way album.

The MDA said it found the eventual performance in compliance with guidelines for that rating, which allows for "some mature content and coarse language".