In 1998, WBPS was acquired by Mega Communications, and on December 1, the station adopted a Spanish adult contemporary format, initially as "Estrella 890" before becoming "Amor 890".

[2] After the failure of a Spanish-language all-news radio format on WNNY (now WKDM) in New York City, Mega began to broker many of the company's stations.

Additionally, when WAMG relocated to 890 as "Mega 890", the frequency inherited the format's simulcast on WLLH (1400 AM) in Lowell and Lawrence, which was not included in 1150's sale to Salem.

Other local programs heard on the station included Salk & Halloran, Lew & Mike, Celtic Pride, and The New England Hockey Journal.

Through its ESPN Radio affiliation, WAMG also served as the Boston outlet for Mike and Mike in the Morning, The Herd with Colin Cowherd, The Scott Van Pelt Show, The Doug Gottlieb Show, and All Night with Jason Smith, as well as ESPN Radio's play-by-play broadcasts, such as Bowl Championship Series, the World Series, and the National Invitation Tournament.

On August 3, 2006, WAMG was the first to report that veteran major league catcher Javy López was being traded from the Baltimore Orioles to the Boston Red Sox.