Sing somebody's / someone's praises

Sing somebody's / someone's praises = нахваливать, петь дифирамбы (to praise someone or something very much).

Примеры:

1) You've obviously made a good impression on Paul - he was singing your praises last night.

2) Mat seems happy enough in Brighton - he's always singing its praises.

3) I hate the city, but my sister is always singing its praises.