Stand by for a Sugababes announcement

What could it be?

1. Cheerio Heidi.
2. Cheerio Amelle.
3. Cheerio Jade.
4. Cheeri Heidi and Amelle.
5. Cheerio Heidi and Jade.
6. Cheerio Amelle and Jade.
7. Cheerio Heidi, Amelle and Jade.
8. Welcome back Siobhan.
9. Welcome back Mutya.
10. Welcome back Keisha.
11. Welcome back Siobhan and Mutya.
12. Welcome back Siobhan and Keisha.
13. NO CHANGE.
14. Welcome back Mutya and Keisha.
15. Welcome back Keisha, cheerio Heidi.
15. Welcome back Keisha, cheerio Amelle.
16. Welcome back Keisha, cheerio Jade.
17. Welcome back Keisha, cheerio Heidi and Amelle.
18. Welcome back Keisha, cheerio Heidi and Jade.
19. Welcome back Keisha, cheerio Amelle and Jade. 
20. Welcome back Mutya, cheerio Heidi and Amelle.
21. Welcome back Mutya, cheerio Heidi and Jade.
22. Welcome back Mutya, cheerio Amelle and Jade. 
23. Welcome back Siobhan, cheerio Heidi and Amelle.
24. Welcome back Siobhan, cheerio Heidi and Jade.
25. Welcome back Siobham, cheerio Amelle and Jade. 
[continue for several centuries] 1198. Welcome back Siobhan and Keisha, cheerio Jade, pause for two minutes, welcome back Mutya, cheerio Keisha.
[continue] 2182. Jade, Heidi and Amelle are about to embark on some sort of boring tour or endorse­ment deal.