"Rolling in the Deep" is a song recorded by British singer-songwriter Adele for her second studio album, 21. The song was written by Adele and Paul Epworth, who described it as a "dark blues-y gospel disco tune". The largest crossover hit in the United States from the past 25 years, "Rolling in the Deep" gained radio airplay from many different radio formats. It was first released on 29 November 2010 as the lead single of the album in digital download format. The lyrics describe the emotions of a scorned lover.

"Rolling in the Deep" was acclaimed by music critics and represented a commercial breakthrough for Adele, propelling her to international success. The song reached number one in 11 countries and the top five in many more regions. It was Adele's first number-one song in the United States, reaching the top spot on many Billboard charts, including the Billboard Hot 100 where it was number one for seven weeks. By February 2012, "Rolling in the Deep" had sold over 7,000,000 copies in the United States, making it the overall second best-selling digital song in the US and Adele's best-selling single outside her native country, topping her previous best-selling "Chasing Pavements". Worldwide, it was the fifth best selling digital single of 2011 with sales of 8.2 million copies. In March 2012, "Rolling in the Deep" became the highest selling digital song by a female artist, surpassing Lady Gaga's previous record with "Poker Face". The song spent 65 weeks on the chart, making the song the third most weeks spent on the chart, tying the place with Jewel with her double single "Foolish Games"/"You Were Meant for Me".

"In the Deep" is a 2003 song written and performed by actress-singer Kathleen York, credited to her performing name Bird York. The song gained fame from its use in the critically acclaimed film Crash; it also appeared on her album The Velvet Hour. In 2006, the song was nominated for an Academy Award for Best Original Song. York performed the song at the 78th Academy Award ceremony on March 5, 2006.

There was some question as to the song's eligibility, as it had appeared in the film The Civilization of Maxwell Bright as well as The Velvet Hour, both of which were released before Crash. However, the Academy of Motion Picture Arts and Sciences determined that the song had been commissioned in 2001 or 2002 by Crash director Paul Haggis for use in the film, prior to its other uses; thus it was eligible.[1] This was likely a precedent for 2007 Best Original Song winner "Falling Slowly", which was also used in other media before the film it was commissioned for, Once, was released.

In March, Bird York appeared on the 12th Billboard chart of the year, with In the Deep peaking at #64 on the Billboard Hot 100 and #29 on the digital downloads chart. The song fell from the chart in its second week of resurgence.

Deep or The Deep may refer to: