Clear your schedule for this afternoon, because MAC is hosting a chat with Viva Glam spokeswoman Eve and her makeup artist, JJ. JJ's the makeup genius who used MAC's C-Shock collection on Eve in her video for "Tambourine." MAC's site provides a listing of the products used on Eve, so this is your chance to ask JJ exactly how she worked her magic! The chat is happening between 5–6pm EST, but it opens up for questions at 4:30pm. Head to MAC to "talk" with Eve and JJ, and let me know if you've played around with any of the C-Shock colors!