This is a list of singles which have debuted in the Top 100, dropped out and then reached number one after re-entering. They do not have to re-enter straight to number-one, but have to leave the Top 100 and find its way to Number one. See also: List of Number 1 Singles and Albums Returning to Number 1.
- We R Who We R - Ke$ha debutted at 95 on 8/01/2011, dropping out of the chart the following week, then later re-entering straight to number 1 on 06/07/2011 after being officially released as a single.
- Let's Get Ready To Rhumble - PJ & Duncan debutted at 18 on 23/07/1994 on the chart, peaking at 9 on 06/08/1994 and spending 11 weeks on the chart in total, before re-entering the chart at number 1 on 06/04/2013 after Ant & Dec performed the song on the ITV show Ant & Dec's Saturday Night Takeaway, which boosted the sales of the single.
- Royals by Lorde.
- Look Right Through by Storm Queen.
- Doo-Wops & Hooligans by Bruno Mars re-entered the chart at No. 1 on 29/01/2011 in its second week on the Top 100.