"Nothing in This World" was released on August 28, 2006 and is the second official single taken from Paris Hilton's debut album Paris, and features vocals from then-unknown pop singer Kesha. The song loosely concerns an unrequited love.

Billboard called it "another undeniably catchy, hook-happy midtempo jewel". It was officially sent to Top 40/Mainstream radio in the United States on August 28, 2006. In United Kingdom, the physical single was released on November 6, 2006, with the single being possible to download a week earlier. The single made number 12 on the US Billboard Hot Dance Club Play chart.

The music video for "Nothing in This World" was shot by Scott Speer in Los Angeles on September 5 and 6, 2006, in South Pasadena and Long Beach Polytechnic High School, California. In this video, Hilton parodies teen flick The Girl Next Door with her own mock movie trailer in which she plays a sexy starlet loved and adored by an incessantly teased, teenage neighbour (played by Nick Lane). Elisha Cuthbert, the original Girl star, makes a cameo and also with an early appearance of actor/model Scott Elrod as the boyfriend. The video premiered on September 22 as an AOL First View, and premiered in Canada on MuchMusic. The video is also popular on YouTube, having received more than 15.5 million views. The video also spent 7 weeks on the VH1 Top 20 Video Countdown, where it peaked at number 5 during its fourth week.

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