Reunited Irish boy band Boyzone's "Brother" (Polydor/Universal), named for the memory of their colleague Stephen Gateley, who died suddenly last October, debuted at the top of the new U.K. album chart. South London rapper Tinie Tempah's "Pass Out" (Parlophone/EMI) started a second week at No. 1 on the singles survey.

The Boyzone album had been behind Gorillaz' "Plastic Beach" (Parlophone/EMI) earlier in the sales week, but forged ahead by the end of Saturday night with total sales of 101,000, according to the Official Chart Company. "Brother," which features Gateley's last recorded vocals, was completed by his Boyzone bandmates in tribute to "Steo," as they knew him.

Lady Gaga makes her "Rock Band" video game debut next week with a four pack of songs that will be added to the Rock Band Music Store, according to an announcement made by Harmonix and MTV Games. "Bad Romance," Just Dance," "Monster" and "Poker Face" will be available for purchase both as the "Lady Gaga Pack 01" as well as individual tracks on Xbox 360 and Playstation 3, and as individual tracks only for Wii.

Additionally, a special version of Gaga's "Poker Face" by Comedy Central's Eric Cartman will be added to the the game store's offerings. The track first appeared in the "Whale Whores" episode of "South Park," which will re-air on March 16 at 10:30 p.m. ET/PT.

Lady Gaga joins over 400 artists with music currently available through the Rock Band platform. She is touring Europe and the United States this spring and fall, as part of her "Monster Ball" tour.