By Elizabeth Mitchell Halter necks, cobalts and neutrals were all popular picks on the red carpet this week. And although the events were still slim due to the holiday season, a few of our favorite ladies were spotted dressed to the nines. Check out Celebs.com's top 5 best-dressed celebs of the week for an insider's look. 5. Demi Lovato Looking absolutely glowing at Seventeen's "Power of Friendship" Luncheon on Wednesday, singer ...