[3] She announced in her blog two songs that she had composed in her time off, "Wisdom of Wind" and "Enough", both later released on the My Winter Storm extended edition.

[4] On January 25, Turunen announced on her blog the name of her follow-up to My Winter Storm and talked about the album, revealing titles and lyrics.

[3] What Lies Beneath, which sold around 1,300 copies in the United States in its first week of release, landed at position 24 on the Billboard's Top Heatseekers, which lists the best-selling albums by new and developing artists.

[7] She revealed in her blog two songs that she composed in her time off, "Wisdom Of Wind" and "Enough", both later released on the My Winter Storm Extended edition.

[8] On 25 January, Turunen posted on her blog announcing the name of her follow-up to My Winter Storm and talking about the album: My friends, Happy 2009!

In a video interview with Metalhead magazine, on 21 June, Tarja said that it "[...] will be a continuation of the method that I used on my first album, My Winter Storm.

[10] Speaking to the german magazine Metal.de, Tarja told that the title of "What Lies Beneath" was actually chosen two years before its release.

[12] The concept and title of the album was actually born from that character, as Tarja said that she invented a whole history around the nymph and her underwater kingdom.

[13] The Naiad's story is also told in another music of What Lies Beneath, the tenth song of the disc, "The Archive of Lost Dreams".

The seventh track of What Lies Beneath tells the story about a powerful and respectable man that is, in fact, a child abuser, "It’s possible to live with a person for many years and suddenly discover a dark side that you never knew existed.”[13] "Until My Last Breath", the third single from the album, reflects the bad things that surrounded the death of Michael Jackson and how people changed without noticing.

"[15] To promote the album, Turunen started the What Lies Beneath World Tour on 12 June 2010, which ended on 8 April 2012, in Rio de Janeiro, Brazil.

Tarja's first live DVD, Act I, was filmed during two nights in Rosario, Argentina, on 30 and 31 March 2012, being released months later, precisely in 24 August 2012.

The first official video was shot in Iceland and features Tarja and some scenes of a diver going to the bottom of the sea.

The final single, "Underneath", receive only limited digital release, but was performed with Jyrki 69 in the Finnish version of the reality show Idols.

The digital single also includes an alternative version of "Dark Star" and the song "Underneath" featuring Jyrki Linnankivi (The 69 Eyes).