Weekly Chart Notes: Bruno Mars, Rihanna, 'Halo'
Bruno Mars Andrew Zaeh

MARS ATTACKS: After his arrest Sunday (Sept. 19) on suspicion of cocaine possession, Bruno Mars instead makes enviable headlines on the Billboard Hot 100, where "Just the Way You Are" ascends 3-1.

The song is Mars' first No. 1 as a lead artist, following his turn as a featured artist on B.o.B's "Nothin' on You," which reigned for two weeks in May. In between, Mars reached No. 4 as a guest on Travie McCoy's "Billionaire" (which will return to the Hot 100 next week as covered by the "Glee" cast).

Mars is the 10th artist since the Hot 100 adopted Nielsen Music data in 1991 to crown the chart as a lead act after first ruling in a featured role. Here is a look at the previous nine such performers and their first No. 1s as featured and lead artists:

K-Ci and JoJo
1996, "How Do U Want It," 2Pac featuring K-Ci and JoJo
1998, "All My Life," K-Ci and JoJo

2000, "Thank God I Found You," Mariah Carey featuring Joe & 98 Degrees
2001, "Stutter," Joe featuring Mystikal

Ja Rule
2001, "I'm Real," Jennifer Lopez featuring Ja Rule
2002, "Always on Time," Ja Rule featuring Ashanti


2002, "Always on Time," Ja Rule featuring Ashanti
2002, "Foolish," Ashanti

Kanye West
2004, "Slow Jamz," Twista featuring Kanye West and Jamie Foxx
2005, "Gold Digger," Kanye West featuring Jamie Foxx

2006, "Promiscuous," Nelly Furtado featuring Timbaland
2007, "Give It to Me," Timbaland featuring Nelly Furtado and Justin Timberlake

2006, "My Love," Justin Timberlake featuring T.I.
2008, "Whatever You Like," T.I.

Dr. Dre
1996, "No Diggity," Blackstreet featuring Dr. Dre
2009, "Crack a Bottle," Eminem, Dr. Dre and 50 Cent

1999, "Heartbreaker," Mariah Carey featuring Jay-Z
2009, "Empire State of Mind," Jay-Z + Alicia Keys

(Like "Billionaire," "Empire State of Mind" is also a week away from storming the Hot 100 courtesy of the "Glee" cast. Jay-Z additionally holds the mark for most No. 1s as a guest before dominating as a lead. Following "Heartbreaker," he reached the summit on Beyonce's "Crazy in Love" in 2003 and Rihanna's "Umbrella" in 2007).

Before the Hot 100's conversion to Nielsen Music data in 1991, Frankie Valli and George Michael each reached No. 1 as group members before leading the list as solo acts. Unlike Mars, however, the singers drew featured billings on tracks by acts to which they belonged - "Careless Whisper" was credited to Wham! featuring George Michael, for instance - as a means to highlight their prominent profiles within their respective groups.

Still, like Mars, certain acts prior to 1991 teamed with lead artists with whom they did not regularly record, affording them No. 1 rankings on the Hot 100 before they topped the chart in starring roles. Billy Preston guested on the Beatles' 1969 No. 1 "Get Back," billed to the Beatles with Billy Preston, before scoring solo toppers in 1973 ("Will It Go Round in Circles") and 1974 ("Nothing From for Nothing"); Peter Cetera's 1986 Hot 100 No. 1 "The Next Time I Fall" with Amy Grant preceded Grant's 1991 chart champion "Baby Baby"; and, Patti Austin's "Baby, Come to Me" with James Ingram reached No. 1 seven years before Ingram propelled "I Don't Have the Heart" to the top in 1990.

"Just the Way You Are" additionally marks the first song released on Elektra Records to top the Hot 100 since Silk's "Freak Me" in 1993.