"Do Ya"/"Stay with Me" is McFly's third single taken from the album Radio:Active and was the official Children in Need single for 2008. It was released physically on 24 November 2008 and for download on 23 November 2008. "Stay with Me" is a cover of a song by The Faces, and was the main Children in Need single. McFly performed both tracks live on Children in Need 2008 on 14 November 2008. "Do Ya" appears on the international soundtrack to the Brazilian telenovela, Três Irmãs.
On 30 November 2008, the single debuted on the UK Singles Chart at number 18 after both physical and digital releases of the song was made available. This marked the first time McFly had ever missed the UK top 10. Previously, their lowest-charting single had been "Ultraviolet/The Ballad of Paul K", which peaked at number nine. Not only is it McFly's lowest-charting single, but it is also the lowest-charting Children in Need single to date, peaking lower than Children in Need's 2007 single, "Headlines" by the Spice Girls, which had peaked at number 11 and "Still Figuring Out" by Elliot Minor, which had peaked at No. 17 in 2008. The single then dropped straight down to number 54 the following week and dropped out of the top 100 altogether during its third week. Staying in the chart for only two weeks, this also broke yet another band record as the single is the shortest-lasting one in the UK top 100.
The video for "Do Ya" is approximately four minutes long, and was released via their YouTube account and their Myspace page. The video begins in a house, where people gather for Christmas, and start opening their presents, which had a McFly member in it. As soon as the band comes out of the boxes, they begin to play the song. More guests arrive, and soon, Zombies arrive at the house. McFly were scared out at the end of the song, and exited via their McMystery Van and off to the moon.
The video for "Do Ya", along with the Christmas Radio:ACTIVE album advert that was recorded at the same time, were controversially refused airplay for being 'too scary' and for the fear of being copied by young viewers (when the McFly members were inside Christmas presents). Eventually, though, it earned airplay on TMF Most Wanted.