Week of Feb. 28

Six new entries this week and a new No. 1 song. First, let's look at No. 1 -- Robbie Williams moves 2-1 with "Last Days of Disco" in its 16th chart week. That's the slowest trip since Owl City's "Fireflies" hit the summit in November in its 17th week. "Disco" becomes Williams' third number one, following "Angels" in 2000 and "Lovelight" in 2007.

One-third of the debuts feature vocals by Mariah Carey. She debuts with a remix of her album track "Angels Cry," featuring Ne-Yo, at No. 37. And at No. 35, she's one of dozens of performers contributing to the remake of R.E.M.'s "Everybody Hurts," a British fund-raiser single for Haiti relief, coordinated by Simon Cowell. The original went to No. 1 in 1993. This version by Helping Haiti is now the fourth Haiti relief song in the countdown, joining Rihanna's "Redemption Song" remake (No. 16), the cover of "Lean on Me" by Sheryl Crow, Kid Rock and Keith Urban (No. 19) and Artists for Haiti's update of "We Are the World" (No. 25).

Other than the Helping Haiti collective, two artists enter the countdown with their first chart hits. Florida-raised country singer Easton Corbin debuts at No. 38 with "A Little More Country Than That," one of seven country crossover songs in this week's countdown (not including the "Lean on Me" remake featuring Keith Urban). One notch below him is Australian native Daniel Merriweather with "Not Giving Up," a nuevo-R&B/pop tune of the Amy Winehouse/Joss Stone/V.V. Brown/James Morrison camp. Actually, Merriweather reminds me of another Daniel from last decade -- Daniel Bedingfield. (Whatever happened to him, anyhow?)